Moisture control /certified fixed orthodontic courses by Indian dental academy

MOISTURE
CONTROL
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com


Definition
• Refers to exculding sulcular fluid, saliva
and gingival bleeding from the
operating field.
• Refers to preventing the hand piece
spray and restorative debris from being
swallowed or aspirated by the patient.

NEED FOR FLUID CONTROL AND
HEMOSTASIS
Hydrophillic material

Hydrophobic material

Increased wettability

Decreased wettability

Decreased contact
angle.
Toloerate and displace
moisture

Increased contact
angle.
Do not tolerate and
displace moisture.


• Dry, clean operating field.
• Access and visibility.
• Enhance the properties of dental
materials.
• Protection of the patient and operator.
• Increases operating efficiency.
• Successful impression making.

IMPORTANCE OF MOISTURE
CONTROL IN IMPRESSION MAKING
• Irreversible hydrocolloid (alginate)
• Reversible hydrocolloid(agar-agar)
• Poly ether elastomers
• Polysulfide
• Addional polyvinyl siloxane
• Condensation polyvinyl siloxane


HYDROPHILLIC
MATERIALS

HYDROPHOBIC
MATERIALS

• DONE BY– RUBBER DAM.
– HIGH VOLUME EVACUATOR
– SALIVA EJECTOR
– SVEDOPTER
– ABSORBENTS
– ANTI SLILOGOGUES

RUBBER DAMARMAMENTARIUM


RUBBER DAM
• Most effective of all isolation device
especially in restorative dentistry.
• Limited application in cast restoration


HIGH VOLUME EVACUATORS
• Used in preparatory phase along with
an assistant
• Suction of water and debris from the
mouth.

SALIVA EJECTORS
• Removes saliva that collects on the floor
of the mouth
• Placed in corner of mouth opposite to
the quadrant being operated
• Disposable inexpensive plastic material
preshaped according to operators use
• Used effectively by lone dentist

SVEDOPTER
• Function both as saliva ejector and
tongue retractor
• Consists of metal saliva ejector with
attached tongue deflector
• Used effectively in mandibular
teeth

DRAW BACKS
• Reduced access to lingual surfaces
mandibular teeth
• Bruises tender soft tissue in floor
mouth
• Cannot be used in presence
mandibular tori

of
of
of

ABSORBENTS
•
•
•

Cotton rolls and cellulose wafers
Used in short periods of isolation
Along with saliva ejectors reduces salivary
flow
• PLACEMENT
– Maxillary teeth
– Mandibular teeth -

Adjacent vestibule
Between teeth and
tongue


ANTI SIALOGOGUES
• Gastro intestional anti cholinergics acting on
smooth muscles and biliary tract
• Produces dry mouth as side effect
• Serves in patients with ineffective isolation
by mechanical devices

DRUGS USED
• Methantheline bromide
• Propantheline bromide

- Banthine
- Pro banthine

• DOSAGE;– ORAL ROUTE :.
• PROBANTHINE
• BANTHINE

-

15 MG
50 MG

– One tablet 1 hour before appointment
produces unpleasent bitter taste

INTRA ORAL INJECTION
• Propantheline

- 2-6 mg

• Onset of action

- 5-10 minutes

• Duration of action

- Approximately 1.5hours

• Drying effect
prolonged by injecting
propantheline

- 2-3 mg after

1.5 hours

CONTRA INDICATIONS
•
•
•
•

Drug hyper sensitivity
Glaucoma
Asthma
Obstructive disorders of gastro intestinal
tract
• Congestive cardiac failure
• Lactating mothers

OTHER DRUGS
• Clondine hydro chloride

: 0.2 mg 1
hour before
the

appointment
• Side effects

: Sedation


HAEMOSTASIS
• It is a method of controlling bleeding
from gingiva.
• Delivered in the gingival sulcus through
retraction cords which are impregnated
with hemostatic agents

HAEMOSTATIC AGENTS
• Racemic epinephrine
• Alum solution ( potassium aluminium sulfate)

- 8%

• Aluminium sulfate / chloride solution
• Ferric sulfate

- 5-25 %

• Tannic acid
• Ferric sub sulfate

- 20-100 %

- 100%
- 13.3 %

(monsel’s solution)

• Zinc chloride solution
• Negatol solution


- 8- 40 %
- 45%

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Moisture control /certified fixed orthodontic courses by Indian dental academy

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