This document defines and discusses overdentures, which are removable partial or complete dentures that rest on remaining natural teeth or dental implants. Overdentures help preserve remaining bone by preventing accelerated bone resorption. They also improve manipulative skills by maintaining proprioception. Appropriate candidates include those with periodontal disease, few remaining teeth, insufficient tooth structure, loss of vertical dimension, or congenital/acquired defects. Key factors in selecting abutment teeth include their periodontal status, location, and endodontic/prosthetic condition. Treatment may involve an immediate denture, extracting hopeless teeth, and subsequent periodontal/endodontic work. Tooth preparations reduce crown length and taper occlusogingiv

1. BY
TEDDIE
MATUNDURA
6th Oct 2014

2. DEFINATION
 A removable partial denture or complete denture that
covers and rests on one or more of the remaining
natural teeth and/or dental implants.
 It is also known as overlay denture, hybrid
prosthesis, telescoping denture or tooth supported
denture.

3. RATIONALE
 Remaining roots offer the best available support for
occlusal force.
 Accelerated rate of bone resorption is prevented.
 It increases the patient’s manipulative skills in
handling the denture. As the patient’s proprioception
is maintained.

4. INDICATIONS
 Periodontal disease
 Few natural remaining teeth
 Insufficient crown/root ratios
 Severe attrition and loss of vertical dimension
 Congenital or acquired intraoral defects e.g. cleft
palate, hypodontia
 Mandibular arch where resorption rate is faster
 Edentulous maxilla opposing dentate mandible
 Post traumatic/post surgical cases

5. SELECTION OF
ABUTEMENT TEETH
The following factors need to be put into consideration;
1. Periodontal status.
2. Abutement location.
 One per quadrant
 No adjacent teeth
3.Endodontic and prosthetic status.
 Usually mandibular cuspids and premolars

6. PREPARATORY TREATMENT
1. Construct an immediate treatment . For
esthetics and to retain jaw relations.
2. Remove hopeless teeth and insert the
removable prosthesis.
3. During the healing period, institute the
periodontal and endodontic treatment.

7. TOOTH PREPARATION
 Remove sufficient tooth structure to provide
favorable root crown ratio.
 Reduce the crown length up to 2 mm above the
gingival crest or extend a chamfer type margin
slightly beneath free gingival margin.
 Taper the preparation occlusogingivally.

8. PLACEMENT
 Overdentures can be placed either directly or
indirectly. The procedures are as follows;
I. Direct placement
 Male or female premanufactured attachment is
cemented into root
 Denture is made and inserted
 Corresponding male or female attachment is
inserted in root
 Attachment is picked up directly in the overdenture
with cold cure acrylic

9. PLACEMENT
II. Indirect Placement
 Male or female attachment is cemented into root or
may need to be cast onto coping
 Corresponding male or female transfer analog is
inserted into root attachment
 Transfer impression is taken and models are poured
with transfer in place
 Laboratory processes denture with corresponding
attachment in place

10. QUERIES???