Prosthodontic over denture for patient that edentulous teeth

1. Overdenture.3

5. Requirements For
Overdenture Attachments
he patients should have low caries index
he patients should perform proper home care
he patients should have sound periodontal health
he patients should have

6. ABUTMENT WITH ATTACHMENTS
Attachments are small precision devices.
Objective is to improve retention of denture base.
Most attachments are secured to abutment by a cast coping.
Consists of two parts o Male o Female

7. here additional retention is needed.
educed labial flange.
educed palatal coverage.
plinting.
When do we use attachments ?

8. Disadvantages of attachments
ime consuming
ncreased cost of treatment .expensive
Plaque control is more difficult
ifficult to construct
epair is difficult
equires careful manipulation by the patient, not recommended for mentally and physically
handicapped.

9. Types of overdenture attachments
tud attachments.
ar attachments.
agnets.

10. Types according to mechanism of action

11. 1. Stud attachment

12. Advantages Of Stud Attachments
ow profile
asy hygiene maintenance
nhanced crown/root ratio

13. Extra radicular stud attachment
Male element projects from the root surface
The stud is attached to the metal coping cemented over the prepared abutment, while the housing is
embedded in the fitting surface of the prosthesis

14. Extra radicular stud attachment
Gerber •
eka •
otherman

15. Stud Attachments
est anchor attachment.
- Ring attachment.
othermann attachment.

16. Intra radicular stud attachment
he stud is attached to the fitting surface of the denture and the housing is incorporated in the
abutment.
est anchor attachment.
- Ring attachment.

17. Zest anchor attachment
Nylon Post Metal Sleeve

18. Zest anchor attachment
4mm
6mm

26. Advantages of Zest anchor
attachment:
t serves well as a temporary fixation for the transitional overdenture.
t can be used without metal coping.
t can be chair-side procedure.

27. Disadvantages of Zest anchor
attachment:
t requires meticulous cleaning and caring.
ylon part needs changing every 3-6m.

29. O - Ring attachment.

39. Rothermann attachment
Male part consists of groove
Female part (housing) consists of C shaped
ring which fits in deeper part of retaining
groove

40. Matrix–eccentric cylinder with undercut or groove
Matrix–Clip or clasp arm

44. Advantages of the Rothermann
attachment:
ow in height.
t has adequate retention similar to the clasp.
he female clip is well retained in the resin.

45. Disadvantages of the Rothermann
attachment:
ufficient denture bulk must be present lingually to
secure the female lug.
hair-side insertion of the female part is very
difficult.

46. Bar attachments
older bar
a- Dolder bar unit.
b- Dolder bar joint

47. Dolder bar unit

48. Dolder bar unit

49. Advantages of bar attachments :
igidly splint the teeth
rovides good retention, stability and support
rovides cross arch stabilization

50. Disadvantages :
ulk of bar
laque accumulation
earing
oldering procedure
anual dexterity

51. Magnets attachments
Cobalt-Samarium magnets.

52. Rare-earth magnets
(cobalt-samarium magnets)
hey possess a high magnetic field strength
hey possess a high intrinsic resistance to demagnetization.
agnetic retention is self-limiting; Retentive forces within the range 155—980 g have been reported.

54. Advantages of magnet attachment:
imple to use.
conomical in cost.
educe the force transmitted to the abutments.
equire little maintenance.

55. Attachments Drawbacks.
ncreased cost of treatment.
aintenance is likely more complicated.
ncreased bulk may lead to denture fracture.
laque control is more difficult.
igher loads is transmitted to abutment.

56. Hygiene and maintenance

57. Overdenture Risks
butment
aries
ear
eriodontium
ingivitis
eriodontitis

58. Plaque control of the abutment teeth
ffective plaque control by the patient
rushing root surfaces to be part of the normal oral hygiene program
hlorhexidine can be helpful in the control of plaque

60. Plaque control of the denture
he overdenture should be brushed after meals with a soft toothbrush
articular attention should be paid to the impression surface in the region of the root face depressions
ypochlorite solutions are found to be efficient

61. Care of the root face
opical fluoride applications should be carried out immediately after the root face preparations.
he patient should use fluoride, in various form to prevent dentine caries.

62. Patient instructions
nce a day Brush the overdenture abutment followed with 0.4% stannous fluoride gel
atients can expectorate the excess fluoride, but should not rinse or drink for at least 30 min
ach morning one drop of 0.4% stannous fluoride gel is placed in to the fitting surface of overdenture