1. DR.FARIBORZ SAADAT DMD.PHD. PROSTHODONTIST
Overdentures
DR.FARIBORZ SAADAT
DMD.PHD.
PROSTHODONTIST

2. Definition
A removable partial or complete denture that covers and rests on one or more remaining natural teeth, the roots of natural teeth or dental implants. It is partially supported by natural teeth or dental implants.

3. Types of Overdentures Tooth supported overdenture.
Implant supported overdenture.

4. Rationale for Overdentures
Bone Preservation.
Edentulous mouth Bone loss of 6.6mm in 7 years.
Dentate mouth Bone loss of 0.8mm in 7 years.
Mandibular bone is affected four times more than the maxillary bone.
Tallgreen A
Acta Odontol Scand 24: , 1966.

5. Advantages of Overdentures
Stability.
Bone preservation
Retention.
Primary retentive areas are preserved

6. Advantages of Overdentures
Attachments
A typical mandibular denture moves about 10mm during function.
Misch C.
Implant Dentistry 2nd Ed. Mosby
Pg: 177.

7. ATTACHMENTS

8. Advantages of Overdentures
Chewing Ability

9. Disadvantages of Overdentures
Expense
Bulkier
Removable Prosthesis

10. Indications for Overdentures
Few remaining teeth are present.
Poor prognosis for complete dentures.

11. Contraindications for Overdentures
If any other prosthetic plan can give superior results

12. Treatment Planning Patient Selection Medical History. Oral Hygiene.
Compliance.
Motivation.

13. Treatment Planning Abutment selection. Inter-arch space. Position.
Number of abutments
Periodontal evaluation.
Endodontic evaluation.
Decay or previous restorations.
Inter-arch space.

14. Inter-arch Space
The determination of a case to be treated with overdentures should be done with care, mounted models are extremely beneficial in determining whether there is adequate space for the overdenture, attachments or copings.

15. Options Put a coping on it Leave it as is
Fill with a restorative material

16. Options

17. Options

18. Denture-abutment Interface
Indirect
Abutments prepared prior to impression
Direct
Abutments prepared at delivery (c.f. Immediate denture)

19. Denture Abutment Interface Direct

20. Denture Abutment Interface Direct

21. Denture Abutment Interface Indirect Preparation

22. Impression

23. Pick up

24. Transfer & analog

25. Mounting transfer pin&analog

26. Delivery

27. Denture Abutment Interface
Indirect

28. Impression

29. pick up impression

30. Ball post attachments

31. Impression for overdentur

35. BALL POST RETAINED
OVERDENTURE

36. Tooth Supported Conical Crown Telescopic Overdentures

62. Overdenture Risks Abutment Periodontium Caries Wear Gingivitis
Periodontitis
Hyperplasia

63. Maintenance
Oral Hygiene
Frequent recalls

64. Thank you