Complete Overdenture Flashcards
What is the definition of a complete over denture?
An over denture is one which gains its support partly or wholly from the roots of retained, decoronated or crown modified teeth
What are the 5 advantages of retaining roots?
- RR preserves the associated alveolar bone
- root face gives extra support
- extra retention via attachment
- Psychological benefit
- Retained proprioception from PDL and tactile discrimination
How is preserving alveolar bone advantageous?
Enhance stability
Prevent resorption
How does retaining root face help with support?
Tissue support greater occlusal loads and protect soft tissue against mechanical trauma
Denture sit on non compressible tissue
How can attachments provide extra support?
CEKA and magnetic attachment provide +ve retention
Will need maintenance / repair
How can retained roots provide psychological benefit?
Knowing have remaining teeth
Lost teeth associated social inequality
How can retaining roots be good for systemic health?
Pt on bisphosphonates
Balance between risk and disease
What are the 5 disadvantages of retaining roots?
- Expensive
- Failure can occur
- Balance issues
- Time intensive
- Maintenance
Why is retaining roots expensive?
Carrying out RCT
May need denture reinforcement
Why can failure occur in retained roots?
Caries
At placement - roots hidden - cariogenic process can be accelerated
Why can balance be an issue with retained roots?
If single/ poorly matched roots on either side = problem with balance
Why can retained roots make process take longer?
Need prep work (RCT), aftercare (caries prophylaxis) and more prolonged tx
Why is maintenance an issue w/ retained roots?
More risk of disease
4 cases where over dentures specially indicated?
- Thought alveolar bone resorption will be significant
- Repeated alterations to dentures might be undesirable and extraction contraindicated
- Increase in face height is needed in case of tooth wear/ hypodontia
- Thought adaptation might be poor/ extra retention is desirable
When may alveolar bone resorption be significant?
Unopposed mandibular anterior teeth - predispose maxillary atrophy