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Internal Derangement of TMJ
Presented by:
Dr. Kamini Dadsena
Post Graduate in OMFS
NHDCRI,Sakri, Bilaspur (C.G.)
Outline:
1. Definition
2. Wilkes Classification
3. Etiology/pathophysiology
4. Physical findings
5. Non Surgical procedure
6. Surgical procedure
7. Summery
8. References
ID was first described by Hey and Davies“ in 1814 as
localized mechanical fault interfering with the smooth
action of a joint.
“A disturbance in the normal anatomic relationship
between the disc and condyle that interferes with
smooth movement of the joint and causes momentary
catching, clicking, popping Or locking.”
-Laskin DM Oral Maxillofacial Surg Clin N Am 1994
Internal derangement is defined as any interference with
smooth joint movement.
-Oral Maxillofacial Surg Clin N Am 20 (2008)
-Oral Maxillofacial Surg Clin N Am 20 (2008)
Disc derangement: A malpositioning of the
articular disc relative to the condyle and
eminence .
With reduction- The articular disc resumes its
normal position on top of the condyle on opening
Without reduction- The articular disc remains
malpositioned on opening attempts, resulting in
restricted mouth opening in acute cases
-Oral Maxillofacial Surg Clin N Am 20 (2008)
Disc adherence - A temporary
sticking of the disc either to the fossa
or to the condyle
Disc adhesion - A fibrotic connection
between the disc and the condyle or
the disc and the fossa
Subluxation (hypermobility)- An
overextension of the disc–condyle
complex on opening beyond the
eminence.
Joint dislocation- A dislocation of the
entire disc–condyle complex beyond the
eminence combined with the inability
to return passively into the fossa
-Oral Maxillofacial Surg Clin N Am 20 (2008)
Wilkes Classification
Stage I -Early reducing disk displacement
Stage II - Late reducing disk displacement
Stage III - Nonreducing disk displacement—
acute/subacute
Stage IV - Nonreducing disk displacement—chronic
Stage V- Nonreducing disk displacement—chronic with
osteoarthrosis
OMFS Fonseca volume- 4
Internal derangement of tmj
Internal derangement of tmj
Internal derangement of tmj
Internal derangement of tmj
Etiology/pathophysiology
• Trauma- most common
• Macrotrauma -
– hit or blow to the face,
– Oral intubation
– dental/surgical procedures difficult extractions,
– elongation of ligaments,
– creating internal joint laxity
-Oral Maxillofacial Surg Clin N Am 20 (2008)
Microtrauma
• Application of prolonged repetitive forces,
such as in clenching or grinding.
• When the force is within physiologic limits,
but is applied to articular cartilage that has a
reduced adaptive capability, or when the force
exceeds the adaptive capability of normal
cartilage, tissue degeneration may ensue .
-Oral Maxillofacial Surg Clin N Am 20 (2008)
formation of = neutralizing
free radicals mechanisms
Mechanical loading of the joint
local hypoxia
Reperfusion of hypoxic cells
an explosive increase in free radicals
LOCAL HYPOXIA REPERFUSION THEORY
degradation of hyaluronic acid
impair the lubrication of the TMJ
increase friction btw joint
components
adherences or an anchored disc
a disc derangement
free radicals may lead
crosslinking of fibrinogen and
fibronectin
-Oral Maxillofacial Surg Clin N Am 20 (2008)
• Indirect trauma
• acceleration-deceleration (whiplash) injuries
in the absence of a direct trauma to the face
• Degenerative joint disease
• Lateral pterygoid spasm
• Occlusal factors
-Oral Maxillofacial Surg Clin N Am 20 (2008)
Physical findings that may indicate ID are:
1. Opening and reciprocal clicking that do not occur at exactly the same
condylar position (stage I or II).
2. Joint tenderness to palpation, especially with function. V
3. Deviation to the affected side until choking occurs. If bilateral clicking is
present, deviation may occur to one side until it clicks, and then to the ‘
other side until it clicks.
4. Deviation of opening (in unilateral cases) with lack of significant
palpable translation (stages III—V). -
5. Pain in the affected joint While biting on a wooden tongue depressor.
6. Crepitus, which is often associated with chronic disk displacement,
perforation, and degenerative changes (stage V).
7- Elimination of pain following local anesthesia of the affected joint.OMFS Fonseca volume- 4
• The need for imaging confirmation of ID is
controversial.
• Panographic imaging is the standard for
screening of the jaws, including the general
morphology of the condyles.
• The disk-condyle relationship is often obvious
from the history and physical examination,
especially in stages I and II disease
• The absence of an imaging study may also
make it more difficult to identify the disk
position in the more chronic cases of stages IV
and V, primarily because the mandibular
opening is often nearly normal, with minimal
deviation or lack of lateral excursions.
• However, it is noted that magnetic resonance
imaging (MRI) and arthrography tend to
overdiagnose disk displacement.
• Therefore, the clinical diagnosis should be the
ultimate determining factor in the decision to
perform surgery.
Non surgical treatments
1. Soft diet
2. Application of heat, cold
3. Medications
4. Acupuncture
5. Electromyographic Biofeedback
6. Ultrasound therapy
7. TENS
8. LASER
9. Intraoral appliances
10.Occlusal therapy
11.Patient education
12.Diagnostic blocks
Management of Temporomandibular Disorders and Occlusion Sixth Edition
Jeffrey P. Okeson, DMD
Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
Application of heat and cold
1-Thermotherapy:
It is the application of hot fomentation on the symptomatic
area for 10 to 15 minutes, not exceeding 30 minutes.
The primary goal, is to increase blood supply through
vasodilatation, leading to decrease pain and joint
stiffness.
2-Coolant therapy:
-It is the application of cold fomentation such as ethyl
chloride and fluoromethane sprays.
-This intend to decrease pain by numbing the symptomatic
area.
-Combination of hot and cold fomentation is helpful.
2. Pharmacologic therapy used to treat
symptoms of TMD can be classified into five
types:
1) analgesics
2) Corticosteroids
3) muscle relaxants
4) anti-depressants
5) local anesthetics.
3-Acupuncture:
It is one of the alternative Medicine techniques.
Its action is still unclear, but was successfully used in
treating TMD symptoms.
4-Electromyographic Biofeedback:
some emotional states may be associated to muscle
hyperactivity, relaxation training assisted by the
use of EMG biofeedback, can reduce diurnal
muscle activity; thus reducing pain.
5-Ultrasound therapy:
It has the same concept of thermotherapy, but more effective;
because it acts on deeper tissues, not just the surface.
Ultrasound not only increases the blood flow in deep tissues
but also seems to separate collagen fibers, which improves
the flexibility and extensibility of connective tissues,
decrease joint stiffness, provide pain relief, improve
mobility, and reduce muscle spasm.
6-Transcutaneous Electrical Nerve
Stimulation “TENS”:
Electric stimulation devices for treatment of
TMD are claimed to have two main
purposes; relief of pain and relief of muscle
hyperactivity or spasm.
7-LASER “Light Amplification by Stimulated
Emission of Radiation”:
It has wide application in dentistry.
The only physical risk is eye damage; special eye goggles
should be worn for protection.
Manual techniques "Hands on therapy":
These include treatment procedures intended to
promote motion and relieve pain in musculoskeletal
structures. As
1-Soft tissue mobilization.
2-Joint mobilization.
3-Muscle conditioning.
b) Assisted muscle stretching:
Stretching, to regain muscle length, should be performed with
gentle intermittent force that is gradually increased, where
pain should not be elicited in this exercise.
Important in management of myofacial pain.
c) Resistance exercises:
Resistance exercises use the concept of reflex relaxation or
reciprocal inhibition.
These exercises are useful if the restricted opening is secondary
to muscle condition.
They should not be used for painful intracapsular restrictions; it
also should not produce pain which could leads to cyclic
muscle pain.
Splint therapy in intracapsular TMD
• Theory: mechanically altering the position of
the mandible can have two results:
1. The condylar head being held in a more inferior,
anterior position will mechanically persuade the
disk to establish itself atop the condylar head in
a more favorable position.
2. The second is that in wearing certain types of
splints (i.e., pivotal splint, mandibular anterior
repositioning appliance [ARA]) the condyle disk
glenoid fossa relationship is “unloaded
The theory hypothesizes:
“UNLOADING THE JOINT
Inflammation
Range of
motion
Symptoms and signs
of TMD - improve
1- Occlusal Therapy
Types of occlusal splints:
• Although there are many types of appliances,
two major types of appliances are commonly
used for TMD. Stabilization splints and
anterior repositioning splints.
a- Stabilization Splint:
• It is a hard acrylic resin, flat plane splint that provides a
temporary and removable ideal occlusion.
• Can be made to cover the maxillary or mandibular dental
arches; although the former provides more retention&
stability.
• patient.
a- Stabilization Splint:
• Stabilization splints are designed to
- provide stabilization of the joint
- redistribution of the occlusal forces at the tooth
and/or joint level
- relaxation of the elevator muscles
- protection of the teeth from the effects of bruxism.
a- Stabilization Splint:
• Myogenous pain disorders respond better to part-
time use, so in bruxism it is suggested that patients
wear the splint only at night.
• Intracapsular disorders are better managed with
continuous use.
• Successful splint therapy needs about two to three
months.
b- Anterior repositioning Splint:
It is a full arch hard acrylic interocclusal
device that can be used in either arch
to encourage the mandible to assume a
position more anterior than intercuspal
position.
However the maxillary arch is preferred
because a guiding ramp can be more
easily fabricated to direct the mandible
anteriorly.
Soft or Resilient Splints:
also known as mouthguard or nightguard.
It is not as effective in reducing myofacial pain
symptoms as is a hard acrylic appliance.
A pivotal type of appliance
• Used to “unload” the temporomandibular
joint components and mildly stretch the joint.
• These can be maxillary or mandibular
appliances with occlusal contact only in the
most posterior tooth.
• They can be designed to be either unilateral or
bilateral, depending on the joint or joints
involved in the disorder.
Surgical procedure:
1. Arthrocentesis and lavage
2. Arthroscopy
3. Arthrotomy with disk repair
1. a. Plication
2. b. Bilaminar flap repair
4. Arthrotomy with diskectomy
5. Arthrotomy with diskectomy and autologous graft disk
replacement
1. a. Dermis
2. b. Auricular cartilage
6. Arthrotomy with diskectomy and autologous flap
reconstructions
7. Arthrotomy with diskectomy and alloplastic disk
replacement
8. Condylotomy
OMFS Fonseca volume- 4
Temporomandibular joint arthrocentesis
• Arthrocentesis consists of TMJ lavage,
placement of medications into the joint, and
examination under anesthesia.
• It usually is performed as an office-based
procedure under local anesthesia assisted
with conscious intravenous sedation, although
it can be performed with local anesthesia
alone
Dent Clin N Am 51 (2007) 195–208
• success rates - 70% to 90%
– Dimitroulis- Br J Oral Maxillofac Surg 1995;33:23–6.
– Hosaka H- Oral Surg Oral Med Oral Pathol Oral RadiolEndod 1996;82:501–4.
– ] Nitzan DW- J Oral Maxillofac Surg 1997;55:151–7.
• primary indication
1. painful limited mouth opening
2. Inflammation in the joint
Arthrocentesis: placement of medication into
upper TM joint space after lavage.
The advantages of arthrocentesis
• it is a simple, cost-effective, minimally invasive
procedure with little morbidity that can be
performed in the office.
No significant complications
• Patients may experience temporary swelling
and soreness over the joint area and a slight
posterior open bite malocclusion for 12 to 24
hours after the procedure.
Indications for temporomandibular joint surgery
• TMJ surgery is indicated if
– (1) pain or dysfunction make the condition
intolerable,
– (2) none of the reasonable nonsurgical modalities
offers adequate levels of relief, and
– (3) the intracapsular condition is a major cause of
the condition.
• Patient selection seems to be the best
determinant of surgical success.
Oral Maxillofacial Surg Clin N Am 18 (2006)
305–310
• The first criterion, significant TMJ pain and
dysfunction, may be the most important.
• The more localized the pain and dysfunction
to the TMJ, the better is the prognosis for a
successful surgical outcome
• The more diffuse the pain and dysfunction,
the less likely it is that surgical intervention
will be successful.
• The second criterion, refractory to nonsurgical
treatment.
• Nonsurgical therapy should include some combination of
patient education, medications, physical therapy, an
occlusal appliance, and possibly, counseling. Most
patients respond successfully to this treatment;
therefore, surgical consideration is reserved only
forpatients who fail to respond successfully.
• Surgical treatment is limited to those who have pain and
dysfunction that arises from within the TMJ.
• Patients who have pain and dysfunction that arise from
the masticatory muscles or other non-TMJ sources are
• The third criterion, imaging evidence of disease,
seems to be the most objective; however,
imaging findings should not be interpreted in
isolation.
• The correlation of imaging findings of disk
derangement and osteoarthrosis with pain are
poor.
• Therefore, imaging evidence should be used to
confirm and support the clinical findings. The
decision for surgical intervention
• The procedure that has the highest potential
for success with the lowest risks and most cost
effectiveness should be chosen for the
patient’s specific problem.
• Arthroscopy simply means ‘‘looking into a joint’’
• Derived from arthros, which means ‘‘joint’’ and scopien,
which means ‘‘to view.’’
• HISTORY :
• Founder - Dr. Kenji Takagi - 1918, University of Tokyo, first
performed in the knee of a cadaver.
• 1937 - presented - poorly accepted.
• 1957 - Dr. Maski Watanabe - atlas of arthroscopy.
• 1970 - Introduction fo fiberoptic light.
• 1971 - Dr. Richard ‘O’ connor - father of modern
arthroscopy. - first used as a therapeutic tool - operative
arthroscope.
R. Dean White, DDS, MS Atlas Oral Maxillofacial Surg Clin N Am
11 (2003) 129–144
• The first published report of temporomandibular joint arthroscopy was by
Professor M. Ohnishi in 1975
• But TMJ arthroscopy did not become popular until reports were published by
Dr. Ken Ichiro Murakami in 1981, 1982, and 1985.
• The first published report in the American literature was by Drs. Nuelle,
Alpern, and Ufema in an orthodontic journal in 1986
• and the first comprehensive study with results was published by Dr. Bruce
Sanders in 1986.
• Arthroscopy is the visualization of a potentially expandable, well confined
joint.
• - Diagnostic
• - Operative
Instrumentation
Cannulas with blunt and sharp trocars. 2.3-mm 0 and 30 Stryker arthroscopes.
Hand instruments: probes, serrated knife, retrograde knife.
Biopsy forceps, alligator forceps.
Arthrotome mechanical shaver blade, electrocautery tips
with insulation.
Arthroscopic technique
Internal derangement of tmj
Internal derangement of tmj
Internal derangement of tmj
• Wilkes classification
• Flaws:
• J Boundaries between different stages are not
lucid J Is it a progressive disorder? J The
criteria used in diagnosis are not provided in
measurable forms Li It fails to high lighten the
role of psychosocial disorders
• RDC/TMDs
• ■ RDC/TMD is a dual axis diagnostic system
for TMDs.
• - It ensures reliable, reproducible and valid
criteria with high sensitivity and specificity to
define the most common types of TMDs
• RDC/TMDs
• Axis // : psychological status
• ■ Pain intensity • Pain related disability ■
Depression ■ Non specific physical symptoms
A, Mandibular stabilization appliance. B, Occlusal view of a mandibular stabilization
appliance with contacts and eccentric guidance marked with articulating paper. Right
(C)
and left (D) lateral view in the musculoskeletally stable position. Right (E) and left (F)
lateral view during eccentric movement of the mandible. The presence of canine
A, The anterior positioning appliance causes
the mandible to assume a forward position,
creating a more favorable condyle-disc
relationship. B, During normal closure the
mandibular anterior teeth contact in the
The patient bites into the setting acrylic at the
desired anterior position as determined by
the groove.
Many clinicians believe that this device will
cause condylar distraction; however, this
has not been documented. B, Because the
pivot is anterior to the force of the elevator
muscles (masseter and temporalis), the joint is
seated to the musculoskeletally stable
position while force is applied to the posterior
tooth contacting the pivot. Studies suggest
that such an appliance loads the joints; it does
not distract the joints. Distraction occurs
only if extraoral force is applied upward on the
chin
A, Clinical photo of a mandibular pivoting
appliance. Only the maxillary first molar
contacts the appliance. B, The patient wore
this appliance continuously for only 2 weeks.
When it was removed, the occlusion changed.
The maxillary first molar was intruded out
of occlusal contact.
• ID was first described by Hey and Davies“ in 1814 as
localized mechanical fault interfering with the smooth
action of a joint.
• “a disturbance in the normal anatomic relationship
between the disc and condyle that interferes with
smooth movement of the joint and causes momentary
catching, clicking, popping Or locking.”
-Laskin DM Oral Maxillofacial Surg Clin N Am 1994
• Internal derangement is defined as any interference
with smooth joint movement.
-Oral Maxillofacial Surg Clin N Am 20 (2008)
• Disc derangement: A malpositioning of the
articular disc relative to the condyle and
eminence
– With reduction- The articular disc resumes its
normal position on top of the condyle on opening
– Without reduction- The articular disc remains
malpositioned on opening attempts, resulting in
restricted mouth opening in acute cases
-Oral Maxillofacial Surg Clin N Am 20 (2008)
• Disc adherence - A temporary sticking of the
disc either to the fossa or to the condyle
• Disc adhesion - A fibrotic connection between
the disc and the condyle or the disc and the
fossa
-Oral Maxillofacial Surg Clin N Am 20 (2008)
• Subluxation (hypermobility)- An overextension
of the disc–condyle complex on opening beyond
the eminence.
• Joint dislocation- A dislocation of the entire disc–
condyle complex beyond the eminence combined
with the inability to return passively into the
fossa
-Oral Maxillofacial Surg Clin N Am 20 (2008)
Internal Derangement of TMJ
part-2
Presented by:
Dr. Kamini Dadsena
Post Graduate in OMFS
NHDCRI,Sakri, Bilaspur (C.G.)
Outline
• Indication & criteria of surgery
• Arthrocentesis & lavage
• Arthroscopic treatment
• Disk Repositioning
• Disk repair
• Diskectomy
• Diskectomy and autologous graft disk replacement
– Temporalis myofacial flap
– Dermis
– Auricular cartilage
• Condylotomy
Indications for TMJ surgery
1. Pain or dysfunction make the condition intolerable,
2. None of the reasonable nonsurgical modalities offers
adequate levels of relief, and
3. The intracapsular condition is a major cause of the condition.
• Surgical treatment is limited to those who have pain and
dysfunction that arises from within the TMJ.
• Patients who have pain and dysfunction that arise from the
masticatory muscles or other non-TMJ sources are not
surgical candidates and they will be made worse by surgical
intervention.
Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
CRITERIA
Significant TMJ pain
and dysfunction
• The more localized
the pain and
dysfunction to the
TMJ the better is
the prognosis
• The more diffuse
the pain and
dysfunction, the
less likely it is that
surgical
intervention will be
successful.
Refractory to
nonsurgical
treatment
• Most patients
respond
successfully to this
treatment;
• therefore, surgical
consideration is
reserved only for
patients who fail to
respond
successfully.
Imaging evidence of
disease
• Imaging findings
should not be
interpreted in
isolation
• Imaging evidence
should be used to
confirm and
support the clinical
findings.
Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
Surgical procedure:
1. Arthrocentesis and lavage
2. Arthroscopic management
3. Disk Repositioning
4. Disk repair
5. Diskectomy
6. Diskectomy and autologous graft disk replacement
1. Temporalis myofacial flap
2. a. Dermis
3. b. Auricular cartilage
7. Condylotomy
OMFS Fonseca volume- 2
Temporomandibular joint
arthrocentesis
• Arthrocentesis consists of TMJ lavage,
placement of medications into the joint, and
examination under anesthesia.
• It usually is performed as an office-based
procedure under local anesthesia assisted
with conscious intravenous sedation, although
it can be performed with local anesthesia
alone
Dent Clin N Am 51 (2007) 195–208
Arthrocentesis and lavage
Dorrit W. Nitzan, DMD Oral Maxillofacial Surg Clin N Am 18 (2006) 311–328
Arthrocentesis: placement of medication into
upper TM joint space after lavage.
Dent Clin N Am 51 (2007) 195–208
• success rates - 70% to 90%
– Dimitroulis- Br J Oral Maxillofac Surg 1995;33:23–6.
– Hosaka H- Oral Surg Oral Med Oral Pathol Oral RadiolEndod 1996;82:501–4.
– Nitzan DW- J Oral Maxillofac Surg 1997;55:151–7.
• primary indication
1. painful limited mouth opening
2. Inflammation in the joint
Dent Clin N Am 51 (2007) 195–208
Study done by Dorrit W. Nitzan
year Sample
size
Study Follow-up Conclusion
JOMS
49.1163-
1167, 1991
17 joints
in 17
patients
Temporomandibular Joint
Arthrocentesis: A Simplified
Treatment for Severe, Limited
Mouth Opening
4 to
14 months.
highly effective in
reestablishing
normal opening and
relieving pain
JOMS
55:151-
157, 1997
Thirty-
nine
patients
(40
joints)
Long-Term Outcome of
Arthrocentesis for Sudden-
Onset, Persistent, Severe Closed
Lock of the Temporomandibular
Joint
6 to 37
months
Arthrocentesis for
sudden-onset closed
lock provided
sustained normal joint
function and marked
pain relief.
J Oral
Maxillofac
Surg
59:1154-
1159, 2001
36
patients
38 joints
The Use of Arthrocentesis for
the Treatment of Osteoarthritic
Temporomandibular Joints
6 to 62
months
Arthrocentesis is a
safe and rapid
procedure that in
many instances results
in the osteoarthritic
TMJs returning to a
healthy functional
state.
Advantages of arthrocentesis
• it is a simple, cost-effective, minimally invasive
procedure with little morbidity that can be performed in
the office.
Dent Clin N Am 51 (2007) 195–208
Complication
•Not significant
•Patients may experience temporary swelling and
soreness over the joint area and a slight posterior open
bite malocclusion for 12 to 24 hours after the procedure.
Disadvantages
Arthrocentesis is clearly inefficient in disorders caused by
factors that cannot be eliminated by lavage, such as disc
displacement with reduction, disc displacement without
reduction, and fibrous adhesions.
ARTHROSCOPIC MANAGEMENT
Derived from two greek words arthros, which means ‘‘joint’’ & scopien, which
means ‘‘to view.’’
Arthroscopy simply means ‘‘looking into a joint’’
HISTORY
• The first published report of temporomandibular joint arthroscopy was
by Professor M. Ohnishi in 1975
• But TMJ arthroscopy did not become popular until reports were
published by Dr. Ken Ichiro Murakami in 1981, 1982, and 1985.
• The first published report in the American literature was by
Drs. Nuelle, Alpern, and Ufema in an orthodontic journal in 1986
• The first comprehensive study with results was published by
Dr. Bruce Sanders in 1986.
• TMJ arthroscopy is now an important aid in the diagnosis and
treatment of temporomandibular disorders(TMD).
1. R. Dean White, DDS, MS Atlas Oral Maxillofacial Surg Clin N Am 11 (2003)
2. OMFS Fonseca volume- 4
Indications
Diagnostic arthroscopy
• Internal derangement
• Osteoarthritis
• Arthritides
• Pseudotumors
• Post-traumatic
complaints
Treatment
• Lavage
• Lysis
• Lateral Capsule Release
• Disk Repositioning
• Synovectomy
• Debridement and
Abrasion
• Intraarticular
Pharmacotherapy
OMFS Fonseca volume- 4
Contraindications
Absolute
contraindications
• Bony ankylosis,
• Advanced
resorption of the
glenoid fossa,
• Infection in the
joint area
• Malignant tumors
Relative
contraindications
• Patients at
increased risk for
hemorrhage,
• Patients at
increased risk for
infection
• Fibrous ankylosis.
OMFS Fonseca volume- 4
Anatomic Considerations
OMFS Fonseca volume- 4
Edward ellis 3rd ed
Grays anatomy
Instrumentation
Cannulas with blunt and sharp trocars. 2.3-mm 0 and 30 Stryker arthroscopes.
Hand instruments: probes, serrated knife, retrograde knife.
R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
Biopsy forceps, alligator forceps.
Arthrotome mechanical shaver blade, electrocautery tips
with insulation.
R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
Preoperative Care
• physical condition of the patient should be reevaluated
• prophylactic treatment implemented.
• Diagnostic TMJ arthroscopy can be performed under
– local anesthesia
– intravenous sedation with Midazolam
• Patients should be asked to remove earrings and contact
lenses before arthroscopy.
• Preoperative radiographic examination may consist of one or
more of the following
– Axial or frontal projection
– TMJ orthopantograph
– Sagittal tomogram (or equivalent)
OMFS Fonseca volume- 4
Puncture directions for the TMJ. (1) Inferolateral.
(2) Endaural. (3) Anterolateral.
Oral and Maxillofacial Surgery Edited by Lars Andersson
normal posterior recess
and posterior ligament.
normal intermediate zone.
normal anterior recess.
Normal arthroscopic
anatomy
R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
Single fibrous adhesions from midportion of disc
to posterior aspect of fossa
Postop view of adhesions
after lysis in the same left joint.
Posterior ligament synovitis of right joint.
Postoperative view of posterior ligament after
cauterization of same right joint
R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
Synovial hyperplasia of left joint. Disc perforation of right joint. Note smooth
surface of condyle anteriorly.
Moderate synovitis of posterior ligament and
posterior band of disc of left joint.
Severe synovitis of posterior ligament and
posterior band of disc of left joint.
R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
Postoperative Care
• Soft diet
• Nsaids
Complications
• Vascular injury
• Extravasation
• Scuffing
• Broken instruments
• Otologic complications
• Intracranial damage
• Infection
• Nerve injury
OMFS Fonseca volume- 4
Vascular injury
• In about 80%, the temporal vessels were involved.
• The bleeding is usually venous in origin and easily
controlled using a tamponade.
• In persistent cases, the cutaneous incision can be extended
slightly and the source of bleeding ligated or controlled
with cautery.
McCain protocol
• All instruments are removed, and the condyle is moved to
the compartment where bleeding has occurred and kept
there for about 5 minutes.
• The instruments are then reinserted to irrigate and debride
clots that may have formed. If this procedure does not
work, the joint must be opened and the bleeding
controlled.
OMFS Fonseca volume- 4
Extravasation of irrigation fluid
• In prolonged arthroscopic surgery the risk is
greater, and cases of extensive edema in the
upper airway with subsequent postobstructive
pulmonary edema have been reported.
• If the surgeon continually checks the outflow,
this is unlikely.
OMFS Fonseca volume- 4
Scuffing
• The cartilage may be scuffed by the trocar
during puncture.
• This lesion can be avoided if the trocar is
directed toward the crest of the glenoid fossa
until it touches the bone.
• The sharp trocar is then exchanged for a blunt
one, which is directed slightly inferiorly to slip
into the upper compartment.
OMFS Fonseca volume- 4
Broken instruments
A protocol for arthroscopic retrieval of broken instruments has been
recommended by McCain and de la Rua
– 1. Stop the procedure and maintain the position of the
arthroscope and working cannulas.
– 2. Keep the broken object in view.
– 3. Check the inflow bags to maintain sufficient irrigation and to
prevent collapse of the joint from lack of fluid.
– 4. Record and measure the depth of the instrument with a scored
cannula.
– 5. Have adequate instruments available for removal.
– 6. Adjust inflow to ensure optimal visibility.
– 7. Radiograph the joint if the object cannot be located.
– 8. Consider fluoroscopic assistance to localize the object if it
cannot be found arthroscopically.
– 9. Remove the object.
OMFS Fonseca volume- 4
Otologic complications
• Van Sickels and colleagues reported a case of
perforation of the tympanic membrane and
partial dislocation of the malleus.
• Applebaum and coworkers described three
patients who largely lost their hearing.
• Such serious complications can be avoided only
by proper training in TMJ anatomy and practice
on cadavers before the clinical use of TMJ
arthroscopy.
• studies indicate that the risk of adverse effects on
hearing is extremely low.
OMFS Fonseca volume- 4
Intracranial damage
• Damage to intracranial structures during TMJ
arthroscopy has been reported.
• In patients whose cartilage and bone show
marked destruction (e.g., advanced
rheumatoid arthritis), great caution must be
exercised, and routine radiographic
examination should be supplemented with CT.
OMFS Fonseca volume- 4
Infection
• the frequency of infection was low (15 cases;
0.3%). (In an extensive review of 3146 patients (4831 joints) by McCain and
colleagues in 1992,:12 )
• Considering recent reports on the increase in
bacterial resistance to antibiotics, routine use of
antibiotic prophylaxis is not advisable.
• Arthroscopy is not indicated if an infection exists
in the area of intended puncture.
• However, in suppurative arthritis, arthroscopic
drainage and lavage can be helpful, and
specimens can be taken for culture.
OMFS Fonseca volume- 4
Nerve injury
• A/C McCain and colleagues – 3/4800 (0.06%)
with permanent nerve damage.“
• The auriculotemporal and facial nerves are
most often involved.
• Excessive extravasation of irrigation fluid may
rarely have a transient effect on the
infraorbital, inferior alveolar, and lingual
nerves.
OMFS Fonseca volume- 4
Disk Repositioning
• In 1979 McCarthy & Farrar 1st reported surgery to
reposition the disk into its normal anatomic
relationship relative to condyle and fossa.
• The chance of successful repositioning increase if the
disk has maintained its normal appearance (white,
shiny, firm) and length, and is minimally displaced.
• The posterior aspect: of the disk is positioned over the
superior portion of the condyle in a normal, healthy
joint.
• If the disk is severely displaced and does not reduce,
loading by the condyle increases on the retrodiskal
tissues, making them hypovascular.
OMFS Fonseca volume- 2
• Both the condyle and the articular eminence can undergo
remodeling, and a “pseudodisc” may eventually form.
• The disk should not be distorted or placed under tension
during posterior repositioning.
• Dense adhesions that result from longstanding disk
displacement often require releasing incisions in the anterior
and/or medial regions of the disc.
• Disc is plicated posteriorly and posterolaterally to return the
anteromedially displaced disc to its more normal anatomic
location.
• Hall describe a partial thickness plication of the disk
• Dolwick and sanders describe full thickness plication, if, the
disc can be repositioned without entering the lower
joint space. inferior joint space must be entered like osseous
contouring of condyle.
• A/C to Weinberg Emenectomy and condylotomy may also
facilitate improved disk repositioning.
• Success rate- 80% or more
(McCarty W, Farrar W: Surgery for internal derangements of the
temporomandibular joint. J Prosthet Dent 1979;42:191.)
OMFS Fonseca volume- 2
Arthrotomy with disk repair
• When indicated, perforations of the disk can be managed by reparative
technique
• For smaller perforations, the disk can be undermined from the
surrounding soft tissue for a tension free primary closure with a
nonresorbable suture.
• Osreophytes and bony overgrowths are commonly found under disk
perforations. Any necessary arthroplasty of the condyle can be
conveniently performed during disk repair procedures through the
perforation.
• Larger perforations of a dislocated disk require a more extensive repair
because the disk will unlikely reduce after the margins of the perforation
are excised because of the more dense adhesion formation and scarring.
• If the disk cannot be adequately repaired, then the surgeon must make
the decision to replace the disk with either an autologous or a
homologous graft, or perform a diskectomy.
OMFS Fonseca volume- 2
DISKECTOMY
• If a deformed disk is determined to be
unsalvageable, a diskectomy is considered.
• Diskectomy-
• First described by Lanz in 1909 diskectomy is
indicated in several instances:
1. irreparable disk perforation;
2. Complete loss of elasticity of the disk;
3. persistent pain and dysfunction even after disk
repositioning
OMFS Fonseca volume- 2
Partial
Total
• Recently Kondoh described a procedure referred to as disk
reshaping, which is a modification of a partial diskectomy.
• Only that portion of the disk and posterior attachment deemed
unsalvageable is excised to eliminate diseased tissue and remove
any obstacle for smooth condylar movement.
• After the disk and posterior attachment are excised and a smooth
motion of the condyle can be consistently repeated
intraoperatively, the condyle can be conservatively recontoured to
remove any irregularities or osteophytes.
• Intact articular cartilage should not be removed from either the
condylar head or the fossa. Excessive removal of articular cartilage
may predispose the joint to heterotopic bone forme tion and
subsequent ankylosis.
• Takaku and Toyoda followed 39 diskectomy patients over an
average of 20 years after surgery. All but two of their patients had
no pain and none experienced masticatory disorders. A mouth
opening of 35 mm was attained by 38 of the patients.
OMFS Fonseca volume- 2
Diskectomy with Replacement
• Rationale-
1. Protect the articular surface from further degenerative changes
2. Prevent joint adhesion
• The graft material was to create scafffold for synovial tissue ingrowth.
• Autologous materials-
1. Temporalis myofacial flaps
2. Auricular cartilage
3. Dermal grafts
OMFS Fonseca volume- 2
Temporalis myofacial flaps
• Advantage
1. Avoid a separate, remote donor site morbidity
2. Vascular flap
3. Its ability to be harvested in variable thickness to allow for
reconstruction of defects of variable size.
• Disadvantages
1. Possible flap necrosis
2. Adhesion formation within joint space
• A flap of 3-4 cm is sufficient.
• Zygomatic arch can be preplated before it osteotomized if the
surgeon desires to place the myofascial flap under the arch
over the eminence.
OMFS Fonseca volume- 2
Auricular cartilage graft
• Advantages
1. Auricular cartilage donot induce foreign body
reaction.
2. Resist most occlusal loading forces.
• Disadvantages
1. Require second donor site
• Complications
1. Prematurely displaced
2. Infection of graft
OMFS Fonseca volume- 2
Auricular cartilage graft
OMFS Fonseca volume- 2
Dermal graft
• Use
1. Disk replacement
2. More commonly disk repair of disc perforation
3. Interpositional material for TMJ Ankylosis
• Donor site:
1. Upper lateral thigh
2. Buttock
3. Groin
• Dermal graft-
1. full thickness
2. partial thickness
• Complete removal of epidermis from graft should be preferable to
avoid leaving epithelial remnant on graft, which may lead to
epithelial cyst formation on condyle from undersurface of graft.
• Disadvantage-
1. remote donor site,
2. fibrous tissue formation
OMFS Fonseca volume- 2
Dermal graft
OMFS Fonseca volume- 2
Modified Condylotomy
 Campbell probably conceived the idea of condylotomy in
1949
 Rhyba performed the first condylotomy in Great Britain.
 Ward and colleagues suggested the term condylotomy and
were the first to publish on the procedure.
 The concept of condylotomy for managing TMJ disease
originated from the early observation that patients who had
fracture dislocations of the mandibular condyle rarely
experienced joint clicking and dysfunction.
 Therefore condylotomy was described as a subcondylar
osteotomy mimicking a displaced subcondylar fracture.
 The procedure was performed in a closed manner using a
Gigli saw.
1983 - converted closed into open procedure.
Modified the relatively new IVRO – named
“modified condylotomy”.
Samuel J. McKenna, DDS, MD Oral Maxillofacial Surg Clin N Am 18 (2006) 369–381
• In 1961 Ward reported on
• In 1965, Campbell reviewed 80 of Ward’s patients who underwent
condylotomy between 1954 and 1964
• Campbell observed that increased joint space on postcondylotomy
tomograms correlated with improved symptoms. Campbell believed that
forward positioning of the condyle could establish a normal disc–condyle
relationship after condylotomy.
• In 1975, Banks and MacKenzie reported that 92% of 141 patients (172
condylotomy procedures) were either cured or improved after
condylotomy. They also noted that increased joint space on
postcondylotomy imaging correlated with improved symptoms
31% - cured,
55% -improved,
27% - unchanged,
9% - worse.
77 patients
responding
to a survey,
6 patients experienced
complete relief
8 patients continued to
improve
14 patients after
condylotomy for TMJ
clicking, locking, and pain.
3 months to 3 years
Samuel J. McKenna, DDS, MD Oral Maxillofacial Surg Clin N Am 18 (2006) 369–381
Internal derangement of tmj
Goals :
– Eliminate pain and dysfunction.
– Reverse the disease process.
– Prevent progression by reestablishing normal disc/condyle
relationship.
Indications :
– Painful TMJ with a reducing displacement of the disc.
– Relent progression to a nonreducing disc.
Contraindications :
– Edentulous patients
– patients with poor intercuspation, flat teeth.
Complications
– Wound infection.
– The condyle may displace in some cases and create an open bite on
the operated side
– Nerve damage
Disadvantages :
– Period of IMF.
– centric relation - centric occlusion discrepancy.
References:
1. Samuel J. McKenna, DDS, MD Oral Maxillofacial Surg Clin N Am 18
(2006) 369–381
2. OMFS Fonseca volume- 4
3. R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11
(2003) 129–144
4. Oral and Maxillofacial Surgery Edited by Lars Andersson
5. Edward ellis 3rd ed
6. Grays anatomy
7. Dorrit W. Nitzan, DMD Oral Maxillofacial Surg Clin N Am 18 (2006) 311–
328
8. Dent Clin N Am 51 (2007) 195–208
9. J Oral Maxillofac Surg 49.1163-1167, 1991
10. J Oral Maxillofac Surg 55:151-157, 1997
11. J Oral Maxillofac Surg 59:1154-1159, 2001
12. Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
THANK YOU
• Mechanism of Action 1. Reduction in pain level: Arthrocentesis reduces
pain by removing inflammatory mediators from the joint. The combined
treatment of arthrocentesis and Sodium Hyaluronate injection may
improve the results due to the long-term lubricating effect of Sodium
Hyaluronate, which prevents the onset of inflammatory mediators that are
responsible for pain.
• 39. 2. Maximal Mouth Opening: Arthrocentesis under high pressure is an
effective method to regain normal mouth opening in closed lock cases.
This effect is usually due to elimination of the adhesions around the disc.
Also the lubricating effect of Sodium Hyaluronate which either maintains
lubrication and minimizes wear and tear mechanically, or plays a role in
nutrition of the avascular parts of the disc and condylar cartilage.
• 40. 3. Clicking : Usually disappears due to decreased friction and
lubricating effect.
• 41. Technique

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Internal derangement of tmj

  • 1. Internal Derangement of TMJ Presented by: Dr. Kamini Dadsena Post Graduate in OMFS NHDCRI,Sakri, Bilaspur (C.G.)
  • 2. Outline: 1. Definition 2. Wilkes Classification 3. Etiology/pathophysiology 4. Physical findings 5. Non Surgical procedure 6. Surgical procedure 7. Summery 8. References
  • 3. ID was first described by Hey and Davies“ in 1814 as localized mechanical fault interfering with the smooth action of a joint. “A disturbance in the normal anatomic relationship between the disc and condyle that interferes with smooth movement of the joint and causes momentary catching, clicking, popping Or locking.” -Laskin DM Oral Maxillofacial Surg Clin N Am 1994 Internal derangement is defined as any interference with smooth joint movement. -Oral Maxillofacial Surg Clin N Am 20 (2008)
  • 4. -Oral Maxillofacial Surg Clin N Am 20 (2008) Disc derangement: A malpositioning of the articular disc relative to the condyle and eminence . With reduction- The articular disc resumes its normal position on top of the condyle on opening Without reduction- The articular disc remains malpositioned on opening attempts, resulting in restricted mouth opening in acute cases
  • 5. -Oral Maxillofacial Surg Clin N Am 20 (2008) Disc adherence - A temporary sticking of the disc either to the fossa or to the condyle Disc adhesion - A fibrotic connection between the disc and the condyle or the disc and the fossa
  • 6. Subluxation (hypermobility)- An overextension of the disc–condyle complex on opening beyond the eminence. Joint dislocation- A dislocation of the entire disc–condyle complex beyond the eminence combined with the inability to return passively into the fossa -Oral Maxillofacial Surg Clin N Am 20 (2008)
  • 7. Wilkes Classification Stage I -Early reducing disk displacement Stage II - Late reducing disk displacement Stage III - Nonreducing disk displacement— acute/subacute Stage IV - Nonreducing disk displacement—chronic Stage V- Nonreducing disk displacement—chronic with osteoarthrosis OMFS Fonseca volume- 4
  • 12. Etiology/pathophysiology • Trauma- most common • Macrotrauma - – hit or blow to the face, – Oral intubation – dental/surgical procedures difficult extractions, – elongation of ligaments, – creating internal joint laxity -Oral Maxillofacial Surg Clin N Am 20 (2008)
  • 13. Microtrauma • Application of prolonged repetitive forces, such as in clenching or grinding. • When the force is within physiologic limits, but is applied to articular cartilage that has a reduced adaptive capability, or when the force exceeds the adaptive capability of normal cartilage, tissue degeneration may ensue . -Oral Maxillofacial Surg Clin N Am 20 (2008)
  • 14. formation of = neutralizing free radicals mechanisms Mechanical loading of the joint local hypoxia Reperfusion of hypoxic cells an explosive increase in free radicals LOCAL HYPOXIA REPERFUSION THEORY
  • 15. degradation of hyaluronic acid impair the lubrication of the TMJ increase friction btw joint components adherences or an anchored disc a disc derangement free radicals may lead crosslinking of fibrinogen and fibronectin -Oral Maxillofacial Surg Clin N Am 20 (2008)
  • 16. • Indirect trauma • acceleration-deceleration (whiplash) injuries in the absence of a direct trauma to the face • Degenerative joint disease • Lateral pterygoid spasm • Occlusal factors -Oral Maxillofacial Surg Clin N Am 20 (2008)
  • 17. Physical findings that may indicate ID are: 1. Opening and reciprocal clicking that do not occur at exactly the same condylar position (stage I or II). 2. Joint tenderness to palpation, especially with function. V 3. Deviation to the affected side until choking occurs. If bilateral clicking is present, deviation may occur to one side until it clicks, and then to the ‘ other side until it clicks. 4. Deviation of opening (in unilateral cases) with lack of significant palpable translation (stages III—V). - 5. Pain in the affected joint While biting on a wooden tongue depressor. 6. Crepitus, which is often associated with chronic disk displacement, perforation, and degenerative changes (stage V). 7- Elimination of pain following local anesthesia of the affected joint.OMFS Fonseca volume- 4
  • 18. • The need for imaging confirmation of ID is controversial. • Panographic imaging is the standard for screening of the jaws, including the general morphology of the condyles. • The disk-condyle relationship is often obvious from the history and physical examination, especially in stages I and II disease
  • 19. • The absence of an imaging study may also make it more difficult to identify the disk position in the more chronic cases of stages IV and V, primarily because the mandibular opening is often nearly normal, with minimal deviation or lack of lateral excursions. • However, it is noted that magnetic resonance imaging (MRI) and arthrography tend to overdiagnose disk displacement. • Therefore, the clinical diagnosis should be the ultimate determining factor in the decision to perform surgery.
  • 20. Non surgical treatments 1. Soft diet 2. Application of heat, cold 3. Medications 4. Acupuncture 5. Electromyographic Biofeedback 6. Ultrasound therapy 7. TENS 8. LASER 9. Intraoral appliances 10.Occlusal therapy 11.Patient education 12.Diagnostic blocks Management of Temporomandibular Disorders and Occlusion Sixth Edition Jeffrey P. Okeson, DMD Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
  • 21. Application of heat and cold 1-Thermotherapy: It is the application of hot fomentation on the symptomatic area for 10 to 15 minutes, not exceeding 30 minutes. The primary goal, is to increase blood supply through vasodilatation, leading to decrease pain and joint stiffness.
  • 22. 2-Coolant therapy: -It is the application of cold fomentation such as ethyl chloride and fluoromethane sprays. -This intend to decrease pain by numbing the symptomatic area. -Combination of hot and cold fomentation is helpful.
  • 23. 2. Pharmacologic therapy used to treat symptoms of TMD can be classified into five types: 1) analgesics 2) Corticosteroids 3) muscle relaxants 4) anti-depressants 5) local anesthetics.
  • 24. 3-Acupuncture: It is one of the alternative Medicine techniques. Its action is still unclear, but was successfully used in treating TMD symptoms.
  • 25. 4-Electromyographic Biofeedback: some emotional states may be associated to muscle hyperactivity, relaxation training assisted by the use of EMG biofeedback, can reduce diurnal muscle activity; thus reducing pain.
  • 26. 5-Ultrasound therapy: It has the same concept of thermotherapy, but more effective; because it acts on deeper tissues, not just the surface. Ultrasound not only increases the blood flow in deep tissues but also seems to separate collagen fibers, which improves the flexibility and extensibility of connective tissues, decrease joint stiffness, provide pain relief, improve mobility, and reduce muscle spasm.
  • 27. 6-Transcutaneous Electrical Nerve Stimulation “TENS”: Electric stimulation devices for treatment of TMD are claimed to have two main purposes; relief of pain and relief of muscle hyperactivity or spasm.
  • 28. 7-LASER “Light Amplification by Stimulated Emission of Radiation”: It has wide application in dentistry. The only physical risk is eye damage; special eye goggles should be worn for protection.
  • 29. Manual techniques "Hands on therapy": These include treatment procedures intended to promote motion and relieve pain in musculoskeletal structures. As 1-Soft tissue mobilization. 2-Joint mobilization. 3-Muscle conditioning.
  • 30. b) Assisted muscle stretching: Stretching, to regain muscle length, should be performed with gentle intermittent force that is gradually increased, where pain should not be elicited in this exercise. Important in management of myofacial pain.
  • 31. c) Resistance exercises: Resistance exercises use the concept of reflex relaxation or reciprocal inhibition. These exercises are useful if the restricted opening is secondary to muscle condition. They should not be used for painful intracapsular restrictions; it also should not produce pain which could leads to cyclic muscle pain.
  • 32. Splint therapy in intracapsular TMD • Theory: mechanically altering the position of the mandible can have two results: 1. The condylar head being held in a more inferior, anterior position will mechanically persuade the disk to establish itself atop the condylar head in a more favorable position. 2. The second is that in wearing certain types of splints (i.e., pivotal splint, mandibular anterior repositioning appliance [ARA]) the condyle disk glenoid fossa relationship is “unloaded
  • 33. The theory hypothesizes: “UNLOADING THE JOINT Inflammation Range of motion Symptoms and signs of TMD - improve
  • 34. 1- Occlusal Therapy Types of occlusal splints: • Although there are many types of appliances, two major types of appliances are commonly used for TMD. Stabilization splints and anterior repositioning splints.
  • 35. a- Stabilization Splint: • It is a hard acrylic resin, flat plane splint that provides a temporary and removable ideal occlusion. • Can be made to cover the maxillary or mandibular dental arches; although the former provides more retention& stability. • patient.
  • 36. a- Stabilization Splint: • Stabilization splints are designed to - provide stabilization of the joint - redistribution of the occlusal forces at the tooth and/or joint level - relaxation of the elevator muscles - protection of the teeth from the effects of bruxism.
  • 37. a- Stabilization Splint: • Myogenous pain disorders respond better to part- time use, so in bruxism it is suggested that patients wear the splint only at night. • Intracapsular disorders are better managed with continuous use. • Successful splint therapy needs about two to three months.
  • 38. b- Anterior repositioning Splint: It is a full arch hard acrylic interocclusal device that can be used in either arch to encourage the mandible to assume a position more anterior than intercuspal position. However the maxillary arch is preferred because a guiding ramp can be more easily fabricated to direct the mandible anteriorly.
  • 39. Soft or Resilient Splints: also known as mouthguard or nightguard. It is not as effective in reducing myofacial pain symptoms as is a hard acrylic appliance.
  • 40. A pivotal type of appliance • Used to “unload” the temporomandibular joint components and mildly stretch the joint. • These can be maxillary or mandibular appliances with occlusal contact only in the most posterior tooth. • They can be designed to be either unilateral or bilateral, depending on the joint or joints involved in the disorder.
  • 41. Surgical procedure: 1. Arthrocentesis and lavage 2. Arthroscopy 3. Arthrotomy with disk repair 1. a. Plication 2. b. Bilaminar flap repair 4. Arthrotomy with diskectomy 5. Arthrotomy with diskectomy and autologous graft disk replacement 1. a. Dermis 2. b. Auricular cartilage 6. Arthrotomy with diskectomy and autologous flap reconstructions 7. Arthrotomy with diskectomy and alloplastic disk replacement 8. Condylotomy OMFS Fonseca volume- 4
  • 42. Temporomandibular joint arthrocentesis • Arthrocentesis consists of TMJ lavage, placement of medications into the joint, and examination under anesthesia. • It usually is performed as an office-based procedure under local anesthesia assisted with conscious intravenous sedation, although it can be performed with local anesthesia alone Dent Clin N Am 51 (2007) 195–208
  • 43. • success rates - 70% to 90% – Dimitroulis- Br J Oral Maxillofac Surg 1995;33:23–6. – Hosaka H- Oral Surg Oral Med Oral Pathol Oral RadiolEndod 1996;82:501–4. – ] Nitzan DW- J Oral Maxillofac Surg 1997;55:151–7. • primary indication 1. painful limited mouth opening 2. Inflammation in the joint
  • 44. Arthrocentesis: placement of medication into upper TM joint space after lavage.
  • 45. The advantages of arthrocentesis • it is a simple, cost-effective, minimally invasive procedure with little morbidity that can be performed in the office. No significant complications • Patients may experience temporary swelling and soreness over the joint area and a slight posterior open bite malocclusion for 12 to 24 hours after the procedure.
  • 46. Indications for temporomandibular joint surgery • TMJ surgery is indicated if – (1) pain or dysfunction make the condition intolerable, – (2) none of the reasonable nonsurgical modalities offers adequate levels of relief, and – (3) the intracapsular condition is a major cause of the condition. • Patient selection seems to be the best determinant of surgical success. Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
  • 47. • The first criterion, significant TMJ pain and dysfunction, may be the most important. • The more localized the pain and dysfunction to the TMJ, the better is the prognosis for a successful surgical outcome • The more diffuse the pain and dysfunction, the less likely it is that surgical intervention will be successful.
  • 48. • The second criterion, refractory to nonsurgical treatment. • Nonsurgical therapy should include some combination of patient education, medications, physical therapy, an occlusal appliance, and possibly, counseling. Most patients respond successfully to this treatment; therefore, surgical consideration is reserved only forpatients who fail to respond successfully. • Surgical treatment is limited to those who have pain and dysfunction that arises from within the TMJ. • Patients who have pain and dysfunction that arise from the masticatory muscles or other non-TMJ sources are
  • 49. • The third criterion, imaging evidence of disease, seems to be the most objective; however, imaging findings should not be interpreted in isolation. • The correlation of imaging findings of disk derangement and osteoarthrosis with pain are poor. • Therefore, imaging evidence should be used to confirm and support the clinical findings. The decision for surgical intervention
  • 50. • The procedure that has the highest potential for success with the lowest risks and most cost effectiveness should be chosen for the patient’s specific problem.
  • 51. • Arthroscopy simply means ‘‘looking into a joint’’ • Derived from arthros, which means ‘‘joint’’ and scopien, which means ‘‘to view.’’ • HISTORY : • Founder - Dr. Kenji Takagi - 1918, University of Tokyo, first performed in the knee of a cadaver. • 1937 - presented - poorly accepted. • 1957 - Dr. Maski Watanabe - atlas of arthroscopy. • 1970 - Introduction fo fiberoptic light. • 1971 - Dr. Richard ‘O’ connor - father of modern arthroscopy. - first used as a therapeutic tool - operative arthroscope. R. Dean White, DDS, MS Atlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
  • 52. • The first published report of temporomandibular joint arthroscopy was by Professor M. Ohnishi in 1975 • But TMJ arthroscopy did not become popular until reports were published by Dr. Ken Ichiro Murakami in 1981, 1982, and 1985. • The first published report in the American literature was by Drs. Nuelle, Alpern, and Ufema in an orthodontic journal in 1986 • and the first comprehensive study with results was published by Dr. Bruce Sanders in 1986. • Arthroscopy is the visualization of a potentially expandable, well confined joint. • - Diagnostic • - Operative
  • 53. Instrumentation Cannulas with blunt and sharp trocars. 2.3-mm 0 and 30 Stryker arthroscopes. Hand instruments: probes, serrated knife, retrograde knife.
  • 54. Biopsy forceps, alligator forceps. Arthrotome mechanical shaver blade, electrocautery tips with insulation.
  • 59. • Wilkes classification • Flaws: • J Boundaries between different stages are not lucid J Is it a progressive disorder? J The criteria used in diagnosis are not provided in measurable forms Li It fails to high lighten the role of psychosocial disorders
  • 60. • RDC/TMDs • ■ RDC/TMD is a dual axis diagnostic system for TMDs. • - It ensures reliable, reproducible and valid criteria with high sensitivity and specificity to define the most common types of TMDs • RDC/TMDs • Axis // : psychological status • ■ Pain intensity • Pain related disability ■ Depression ■ Non specific physical symptoms
  • 61. A, Mandibular stabilization appliance. B, Occlusal view of a mandibular stabilization appliance with contacts and eccentric guidance marked with articulating paper. Right (C) and left (D) lateral view in the musculoskeletally stable position. Right (E) and left (F) lateral view during eccentric movement of the mandible. The presence of canine
  • 62. A, The anterior positioning appliance causes the mandible to assume a forward position, creating a more favorable condyle-disc relationship. B, During normal closure the mandibular anterior teeth contact in the
  • 63. The patient bites into the setting acrylic at the desired anterior position as determined by the groove.
  • 64. Many clinicians believe that this device will cause condylar distraction; however, this has not been documented. B, Because the pivot is anterior to the force of the elevator muscles (masseter and temporalis), the joint is seated to the musculoskeletally stable position while force is applied to the posterior tooth contacting the pivot. Studies suggest that such an appliance loads the joints; it does not distract the joints. Distraction occurs only if extraoral force is applied upward on the chin
  • 65. A, Clinical photo of a mandibular pivoting appliance. Only the maxillary first molar contacts the appliance. B, The patient wore this appliance continuously for only 2 weeks. When it was removed, the occlusion changed. The maxillary first molar was intruded out of occlusal contact.
  • 66. • ID was first described by Hey and Davies“ in 1814 as localized mechanical fault interfering with the smooth action of a joint. • “a disturbance in the normal anatomic relationship between the disc and condyle that interferes with smooth movement of the joint and causes momentary catching, clicking, popping Or locking.” -Laskin DM Oral Maxillofacial Surg Clin N Am 1994 • Internal derangement is defined as any interference with smooth joint movement. -Oral Maxillofacial Surg Clin N Am 20 (2008)
  • 67. • Disc derangement: A malpositioning of the articular disc relative to the condyle and eminence – With reduction- The articular disc resumes its normal position on top of the condyle on opening – Without reduction- The articular disc remains malpositioned on opening attempts, resulting in restricted mouth opening in acute cases -Oral Maxillofacial Surg Clin N Am 20 (2008)
  • 68. • Disc adherence - A temporary sticking of the disc either to the fossa or to the condyle • Disc adhesion - A fibrotic connection between the disc and the condyle or the disc and the fossa -Oral Maxillofacial Surg Clin N Am 20 (2008)
  • 69. • Subluxation (hypermobility)- An overextension of the disc–condyle complex on opening beyond the eminence. • Joint dislocation- A dislocation of the entire disc– condyle complex beyond the eminence combined with the inability to return passively into the fossa -Oral Maxillofacial Surg Clin N Am 20 (2008)
  • 70. Internal Derangement of TMJ part-2 Presented by: Dr. Kamini Dadsena Post Graduate in OMFS NHDCRI,Sakri, Bilaspur (C.G.)
  • 71. Outline • Indication & criteria of surgery • Arthrocentesis & lavage • Arthroscopic treatment • Disk Repositioning • Disk repair • Diskectomy • Diskectomy and autologous graft disk replacement – Temporalis myofacial flap – Dermis – Auricular cartilage • Condylotomy
  • 72. Indications for TMJ surgery 1. Pain or dysfunction make the condition intolerable, 2. None of the reasonable nonsurgical modalities offers adequate levels of relief, and 3. The intracapsular condition is a major cause of the condition. • Surgical treatment is limited to those who have pain and dysfunction that arises from within the TMJ. • Patients who have pain and dysfunction that arise from the masticatory muscles or other non-TMJ sources are not surgical candidates and they will be made worse by surgical intervention. Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
  • 73. CRITERIA Significant TMJ pain and dysfunction • The more localized the pain and dysfunction to the TMJ the better is the prognosis • The more diffuse the pain and dysfunction, the less likely it is that surgical intervention will be successful. Refractory to nonsurgical treatment • Most patients respond successfully to this treatment; • therefore, surgical consideration is reserved only for patients who fail to respond successfully. Imaging evidence of disease • Imaging findings should not be interpreted in isolation • Imaging evidence should be used to confirm and support the clinical findings. Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
  • 74. Surgical procedure: 1. Arthrocentesis and lavage 2. Arthroscopic management 3. Disk Repositioning 4. Disk repair 5. Diskectomy 6. Diskectomy and autologous graft disk replacement 1. Temporalis myofacial flap 2. a. Dermis 3. b. Auricular cartilage 7. Condylotomy OMFS Fonseca volume- 2
  • 75. Temporomandibular joint arthrocentesis • Arthrocentesis consists of TMJ lavage, placement of medications into the joint, and examination under anesthesia. • It usually is performed as an office-based procedure under local anesthesia assisted with conscious intravenous sedation, although it can be performed with local anesthesia alone Dent Clin N Am 51 (2007) 195–208
  • 76. Arthrocentesis and lavage Dorrit W. Nitzan, DMD Oral Maxillofacial Surg Clin N Am 18 (2006) 311–328
  • 77. Arthrocentesis: placement of medication into upper TM joint space after lavage. Dent Clin N Am 51 (2007) 195–208
  • 78. • success rates - 70% to 90% – Dimitroulis- Br J Oral Maxillofac Surg 1995;33:23–6. – Hosaka H- Oral Surg Oral Med Oral Pathol Oral RadiolEndod 1996;82:501–4. – Nitzan DW- J Oral Maxillofac Surg 1997;55:151–7. • primary indication 1. painful limited mouth opening 2. Inflammation in the joint Dent Clin N Am 51 (2007) 195–208
  • 79. Study done by Dorrit W. Nitzan year Sample size Study Follow-up Conclusion JOMS 49.1163- 1167, 1991 17 joints in 17 patients Temporomandibular Joint Arthrocentesis: A Simplified Treatment for Severe, Limited Mouth Opening 4 to 14 months. highly effective in reestablishing normal opening and relieving pain JOMS 55:151- 157, 1997 Thirty- nine patients (40 joints) Long-Term Outcome of Arthrocentesis for Sudden- Onset, Persistent, Severe Closed Lock of the Temporomandibular Joint 6 to 37 months Arthrocentesis for sudden-onset closed lock provided sustained normal joint function and marked pain relief. J Oral Maxillofac Surg 59:1154- 1159, 2001 36 patients 38 joints The Use of Arthrocentesis for the Treatment of Osteoarthritic Temporomandibular Joints 6 to 62 months Arthrocentesis is a safe and rapid procedure that in many instances results in the osteoarthritic TMJs returning to a healthy functional state.
  • 80. Advantages of arthrocentesis • it is a simple, cost-effective, minimally invasive procedure with little morbidity that can be performed in the office. Dent Clin N Am 51 (2007) 195–208 Complication •Not significant •Patients may experience temporary swelling and soreness over the joint area and a slight posterior open bite malocclusion for 12 to 24 hours after the procedure. Disadvantages Arthrocentesis is clearly inefficient in disorders caused by factors that cannot be eliminated by lavage, such as disc displacement with reduction, disc displacement without reduction, and fibrous adhesions.
  • 81. ARTHROSCOPIC MANAGEMENT Derived from two greek words arthros, which means ‘‘joint’’ & scopien, which means ‘‘to view.’’ Arthroscopy simply means ‘‘looking into a joint’’
  • 82. HISTORY • The first published report of temporomandibular joint arthroscopy was by Professor M. Ohnishi in 1975 • But TMJ arthroscopy did not become popular until reports were published by Dr. Ken Ichiro Murakami in 1981, 1982, and 1985. • The first published report in the American literature was by Drs. Nuelle, Alpern, and Ufema in an orthodontic journal in 1986 • The first comprehensive study with results was published by Dr. Bruce Sanders in 1986. • TMJ arthroscopy is now an important aid in the diagnosis and treatment of temporomandibular disorders(TMD). 1. R. Dean White, DDS, MS Atlas Oral Maxillofacial Surg Clin N Am 11 (2003) 2. OMFS Fonseca volume- 4
  • 83. Indications Diagnostic arthroscopy • Internal derangement • Osteoarthritis • Arthritides • Pseudotumors • Post-traumatic complaints Treatment • Lavage • Lysis • Lateral Capsule Release • Disk Repositioning • Synovectomy • Debridement and Abrasion • Intraarticular Pharmacotherapy OMFS Fonseca volume- 4
  • 84. Contraindications Absolute contraindications • Bony ankylosis, • Advanced resorption of the glenoid fossa, • Infection in the joint area • Malignant tumors Relative contraindications • Patients at increased risk for hemorrhage, • Patients at increased risk for infection • Fibrous ankylosis. OMFS Fonseca volume- 4
  • 85. Anatomic Considerations OMFS Fonseca volume- 4 Edward ellis 3rd ed Grays anatomy
  • 86. Instrumentation Cannulas with blunt and sharp trocars. 2.3-mm 0 and 30 Stryker arthroscopes. Hand instruments: probes, serrated knife, retrograde knife. R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
  • 87. Biopsy forceps, alligator forceps. Arthrotome mechanical shaver blade, electrocautery tips with insulation. R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
  • 88. Preoperative Care • physical condition of the patient should be reevaluated • prophylactic treatment implemented. • Diagnostic TMJ arthroscopy can be performed under – local anesthesia – intravenous sedation with Midazolam • Patients should be asked to remove earrings and contact lenses before arthroscopy. • Preoperative radiographic examination may consist of one or more of the following – Axial or frontal projection – TMJ orthopantograph – Sagittal tomogram (or equivalent) OMFS Fonseca volume- 4
  • 89. Puncture directions for the TMJ. (1) Inferolateral. (2) Endaural. (3) Anterolateral. Oral and Maxillofacial Surgery Edited by Lars Andersson
  • 90. normal posterior recess and posterior ligament. normal intermediate zone. normal anterior recess. Normal arthroscopic anatomy R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
  • 91. Single fibrous adhesions from midportion of disc to posterior aspect of fossa Postop view of adhesions after lysis in the same left joint. Posterior ligament synovitis of right joint. Postoperative view of posterior ligament after cauterization of same right joint R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
  • 92. Synovial hyperplasia of left joint. Disc perforation of right joint. Note smooth surface of condyle anteriorly. Moderate synovitis of posterior ligament and posterior band of disc of left joint. Severe synovitis of posterior ligament and posterior band of disc of left joint. R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
  • 93. Postoperative Care • Soft diet • Nsaids
  • 94. Complications • Vascular injury • Extravasation • Scuffing • Broken instruments • Otologic complications • Intracranial damage • Infection • Nerve injury OMFS Fonseca volume- 4
  • 95. Vascular injury • In about 80%, the temporal vessels were involved. • The bleeding is usually venous in origin and easily controlled using a tamponade. • In persistent cases, the cutaneous incision can be extended slightly and the source of bleeding ligated or controlled with cautery. McCain protocol • All instruments are removed, and the condyle is moved to the compartment where bleeding has occurred and kept there for about 5 minutes. • The instruments are then reinserted to irrigate and debride clots that may have formed. If this procedure does not work, the joint must be opened and the bleeding controlled. OMFS Fonseca volume- 4
  • 96. Extravasation of irrigation fluid • In prolonged arthroscopic surgery the risk is greater, and cases of extensive edema in the upper airway with subsequent postobstructive pulmonary edema have been reported. • If the surgeon continually checks the outflow, this is unlikely. OMFS Fonseca volume- 4
  • 97. Scuffing • The cartilage may be scuffed by the trocar during puncture. • This lesion can be avoided if the trocar is directed toward the crest of the glenoid fossa until it touches the bone. • The sharp trocar is then exchanged for a blunt one, which is directed slightly inferiorly to slip into the upper compartment. OMFS Fonseca volume- 4
  • 98. Broken instruments A protocol for arthroscopic retrieval of broken instruments has been recommended by McCain and de la Rua – 1. Stop the procedure and maintain the position of the arthroscope and working cannulas. – 2. Keep the broken object in view. – 3. Check the inflow bags to maintain sufficient irrigation and to prevent collapse of the joint from lack of fluid. – 4. Record and measure the depth of the instrument with a scored cannula. – 5. Have adequate instruments available for removal. – 6. Adjust inflow to ensure optimal visibility. – 7. Radiograph the joint if the object cannot be located. – 8. Consider fluoroscopic assistance to localize the object if it cannot be found arthroscopically. – 9. Remove the object. OMFS Fonseca volume- 4
  • 99. Otologic complications • Van Sickels and colleagues reported a case of perforation of the tympanic membrane and partial dislocation of the malleus. • Applebaum and coworkers described three patients who largely lost their hearing. • Such serious complications can be avoided only by proper training in TMJ anatomy and practice on cadavers before the clinical use of TMJ arthroscopy. • studies indicate that the risk of adverse effects on hearing is extremely low. OMFS Fonseca volume- 4
  • 100. Intracranial damage • Damage to intracranial structures during TMJ arthroscopy has been reported. • In patients whose cartilage and bone show marked destruction (e.g., advanced rheumatoid arthritis), great caution must be exercised, and routine radiographic examination should be supplemented with CT. OMFS Fonseca volume- 4
  • 101. Infection • the frequency of infection was low (15 cases; 0.3%). (In an extensive review of 3146 patients (4831 joints) by McCain and colleagues in 1992,:12 ) • Considering recent reports on the increase in bacterial resistance to antibiotics, routine use of antibiotic prophylaxis is not advisable. • Arthroscopy is not indicated if an infection exists in the area of intended puncture. • However, in suppurative arthritis, arthroscopic drainage and lavage can be helpful, and specimens can be taken for culture. OMFS Fonseca volume- 4
  • 102. Nerve injury • A/C McCain and colleagues – 3/4800 (0.06%) with permanent nerve damage.“ • The auriculotemporal and facial nerves are most often involved. • Excessive extravasation of irrigation fluid may rarely have a transient effect on the infraorbital, inferior alveolar, and lingual nerves. OMFS Fonseca volume- 4
  • 103. Disk Repositioning • In 1979 McCarthy & Farrar 1st reported surgery to reposition the disk into its normal anatomic relationship relative to condyle and fossa. • The chance of successful repositioning increase if the disk has maintained its normal appearance (white, shiny, firm) and length, and is minimally displaced. • The posterior aspect: of the disk is positioned over the superior portion of the condyle in a normal, healthy joint. • If the disk is severely displaced and does not reduce, loading by the condyle increases on the retrodiskal tissues, making them hypovascular. OMFS Fonseca volume- 2
  • 104. • Both the condyle and the articular eminence can undergo remodeling, and a “pseudodisc” may eventually form. • The disk should not be distorted or placed under tension during posterior repositioning. • Dense adhesions that result from longstanding disk displacement often require releasing incisions in the anterior and/or medial regions of the disc. • Disc is plicated posteriorly and posterolaterally to return the anteromedially displaced disc to its more normal anatomic location. • Hall describe a partial thickness plication of the disk • Dolwick and sanders describe full thickness plication, if, the disc can be repositioned without entering the lower joint space. inferior joint space must be entered like osseous contouring of condyle. • A/C to Weinberg Emenectomy and condylotomy may also facilitate improved disk repositioning. • Success rate- 80% or more (McCarty W, Farrar W: Surgery for internal derangements of the temporomandibular joint. J Prosthet Dent 1979;42:191.) OMFS Fonseca volume- 2
  • 105. Arthrotomy with disk repair • When indicated, perforations of the disk can be managed by reparative technique • For smaller perforations, the disk can be undermined from the surrounding soft tissue for a tension free primary closure with a nonresorbable suture. • Osreophytes and bony overgrowths are commonly found under disk perforations. Any necessary arthroplasty of the condyle can be conveniently performed during disk repair procedures through the perforation. • Larger perforations of a dislocated disk require a more extensive repair because the disk will unlikely reduce after the margins of the perforation are excised because of the more dense adhesion formation and scarring. • If the disk cannot be adequately repaired, then the surgeon must make the decision to replace the disk with either an autologous or a homologous graft, or perform a diskectomy. OMFS Fonseca volume- 2
  • 106. DISKECTOMY • If a deformed disk is determined to be unsalvageable, a diskectomy is considered. • Diskectomy- • First described by Lanz in 1909 diskectomy is indicated in several instances: 1. irreparable disk perforation; 2. Complete loss of elasticity of the disk; 3. persistent pain and dysfunction even after disk repositioning OMFS Fonseca volume- 2 Partial Total
  • 107. • Recently Kondoh described a procedure referred to as disk reshaping, which is a modification of a partial diskectomy. • Only that portion of the disk and posterior attachment deemed unsalvageable is excised to eliminate diseased tissue and remove any obstacle for smooth condylar movement. • After the disk and posterior attachment are excised and a smooth motion of the condyle can be consistently repeated intraoperatively, the condyle can be conservatively recontoured to remove any irregularities or osteophytes. • Intact articular cartilage should not be removed from either the condylar head or the fossa. Excessive removal of articular cartilage may predispose the joint to heterotopic bone forme tion and subsequent ankylosis. • Takaku and Toyoda followed 39 diskectomy patients over an average of 20 years after surgery. All but two of their patients had no pain and none experienced masticatory disorders. A mouth opening of 35 mm was attained by 38 of the patients. OMFS Fonseca volume- 2
  • 108. Diskectomy with Replacement • Rationale- 1. Protect the articular surface from further degenerative changes 2. Prevent joint adhesion • The graft material was to create scafffold for synovial tissue ingrowth. • Autologous materials- 1. Temporalis myofacial flaps 2. Auricular cartilage 3. Dermal grafts OMFS Fonseca volume- 2
  • 109. Temporalis myofacial flaps • Advantage 1. Avoid a separate, remote donor site morbidity 2. Vascular flap 3. Its ability to be harvested in variable thickness to allow for reconstruction of defects of variable size. • Disadvantages 1. Possible flap necrosis 2. Adhesion formation within joint space • A flap of 3-4 cm is sufficient. • Zygomatic arch can be preplated before it osteotomized if the surgeon desires to place the myofascial flap under the arch over the eminence. OMFS Fonseca volume- 2
  • 110. Auricular cartilage graft • Advantages 1. Auricular cartilage donot induce foreign body reaction. 2. Resist most occlusal loading forces. • Disadvantages 1. Require second donor site • Complications 1. Prematurely displaced 2. Infection of graft OMFS Fonseca volume- 2
  • 111. Auricular cartilage graft OMFS Fonseca volume- 2
  • 112. Dermal graft • Use 1. Disk replacement 2. More commonly disk repair of disc perforation 3. Interpositional material for TMJ Ankylosis • Donor site: 1. Upper lateral thigh 2. Buttock 3. Groin • Dermal graft- 1. full thickness 2. partial thickness • Complete removal of epidermis from graft should be preferable to avoid leaving epithelial remnant on graft, which may lead to epithelial cyst formation on condyle from undersurface of graft. • Disadvantage- 1. remote donor site, 2. fibrous tissue formation OMFS Fonseca volume- 2
  • 114. Modified Condylotomy  Campbell probably conceived the idea of condylotomy in 1949  Rhyba performed the first condylotomy in Great Britain.  Ward and colleagues suggested the term condylotomy and were the first to publish on the procedure.  The concept of condylotomy for managing TMJ disease originated from the early observation that patients who had fracture dislocations of the mandibular condyle rarely experienced joint clicking and dysfunction.  Therefore condylotomy was described as a subcondylar osteotomy mimicking a displaced subcondylar fracture.  The procedure was performed in a closed manner using a Gigli saw. 1983 - converted closed into open procedure. Modified the relatively new IVRO – named “modified condylotomy”. Samuel J. McKenna, DDS, MD Oral Maxillofacial Surg Clin N Am 18 (2006) 369–381
  • 115. • In 1961 Ward reported on • In 1965, Campbell reviewed 80 of Ward’s patients who underwent condylotomy between 1954 and 1964 • Campbell observed that increased joint space on postcondylotomy tomograms correlated with improved symptoms. Campbell believed that forward positioning of the condyle could establish a normal disc–condyle relationship after condylotomy. • In 1975, Banks and MacKenzie reported that 92% of 141 patients (172 condylotomy procedures) were either cured or improved after condylotomy. They also noted that increased joint space on postcondylotomy imaging correlated with improved symptoms 31% - cured, 55% -improved, 27% - unchanged, 9% - worse. 77 patients responding to a survey, 6 patients experienced complete relief 8 patients continued to improve 14 patients after condylotomy for TMJ clicking, locking, and pain. 3 months to 3 years Samuel J. McKenna, DDS, MD Oral Maxillofacial Surg Clin N Am 18 (2006) 369–381
  • 117. Goals : – Eliminate pain and dysfunction. – Reverse the disease process. – Prevent progression by reestablishing normal disc/condyle relationship. Indications : – Painful TMJ with a reducing displacement of the disc. – Relent progression to a nonreducing disc. Contraindications : – Edentulous patients – patients with poor intercuspation, flat teeth. Complications – Wound infection. – The condyle may displace in some cases and create an open bite on the operated side – Nerve damage Disadvantages : – Period of IMF. – centric relation - centric occlusion discrepancy.
  • 118. References: 1. Samuel J. McKenna, DDS, MD Oral Maxillofacial Surg Clin N Am 18 (2006) 369–381 2. OMFS Fonseca volume- 4 3. R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144 4. Oral and Maxillofacial Surgery Edited by Lars Andersson 5. Edward ellis 3rd ed 6. Grays anatomy 7. Dorrit W. Nitzan, DMD Oral Maxillofacial Surg Clin N Am 18 (2006) 311– 328 8. Dent Clin N Am 51 (2007) 195–208 9. J Oral Maxillofac Surg 49.1163-1167, 1991 10. J Oral Maxillofac Surg 55:151-157, 1997 11. J Oral Maxillofac Surg 59:1154-1159, 2001 12. Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
  • 120. • Mechanism of Action 1. Reduction in pain level: Arthrocentesis reduces pain by removing inflammatory mediators from the joint. The combined treatment of arthrocentesis and Sodium Hyaluronate injection may improve the results due to the long-term lubricating effect of Sodium Hyaluronate, which prevents the onset of inflammatory mediators that are responsible for pain. • 39. 2. Maximal Mouth Opening: Arthrocentesis under high pressure is an effective method to regain normal mouth opening in closed lock cases. This effect is usually due to elimination of the adhesions around the disc. Also the lubricating effect of Sodium Hyaluronate which either maintains lubrication and minimizes wear and tear mechanically, or plays a role in nutrition of the avascular parts of the disc and condylar cartilage. • 40. 3. Clicking : Usually disappears due to decreased friction and lubricating effect. • 41. Technique