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1. OVERDENTURE

2. •DEFINITION: (According to GPT-9) : any removable dental
prosthesis that covers and rests on one or more
remaining natural teeth, the roots of natural teeth,
and/or dental implants; a dental prosthesis that covers
and is partially supported by natural teeth, natural
tooth roots, and/or dental implants
Also termed as overlay denture ( CRUM & ROONEY), overlay
prosthesis, telescope denture ( PEREL), biologic denture,
superimposed prosthesis

3. ADVANTAGES :ADVANTAGES :
•Preservation of alveolar bone
•Preservation of proprioception
•Support
•Retention
•Patient acceptance
•Convertibility
•Horizontal & torqueing forces are minimized.
•Fewer post insertion problems as compared to conventional dentures.
•Its application is virtually unlimited & depends on dentists skill & judgement.

4. DISADVANTAGES-
•More expensive.
•Frequently need periodontal therapy.
•Bulkier than FPD or RPD.
•Periodontal disease may progress.
•Secondary caries under the margin of the copings.

5. INDICATIONSINDICATIONS::
•Presence of few healthy teeth in oral cavity.
•Pt. with badly attrited down teeth.
•Pt. with congenital or acquired intraoral defect of cleft palate,
oligodontia, microdontia & cliedocranial dysostosis.
•Pt. with poor prognosis for complete denture like high palatal
vault & steep ridge slope.

6. CONTRAINDICATIONSCONTRAINDICATIONS :
•When another line of treatment promises to give superior results.
•It is contraindicated in pt. who cannot maintain good oral hygiene
to keep abutment teeth & its periodontal tissue healthy.
•Teeth or tooth in which periodontal or endodontic treatment is
contraindicated.
•Undercuts
•Reduced inter arch space

7. Classification

8. BASED ON TYPE (BREWER & MORROW
•Immediate
•Transitional / interim overdentures.
•Remote / Permanent over dentures.

9. Types :
Attachments :
Ball attachment Bar & clip attachment telescopic overdentue stud attachment bar attachment
Short copings long copings non-coping nylon coping implant supported