Complete dentures opposed by natural teeth

Question 1

What negative effects can presence of natural teeth opposing edentulous ridge have?

Answer 1

Trauma - high force levels against edentulous ridge
Instability of denture
Combination syndrome

Question 2

What effects does a flabby/ fibrous ridge have on a denture?

Answer 2

Tissue displacing during impression
Tipping of prosthesis

Question 3

What is combination syndrome?

Answer 3

Associated with flabby ridge
Generally when there is an edentulous maxilla and they only have lower 3-3 (anterior) teeth.
All the biting force is on the upper 3-3 ridge, so the bone resorbs and mucosa thickens, resulting in a flabby ridge.

Question 4

How can you reduce trauma to the maxillary denture-bearing area?

Answer 4

Maximise coverage of denture-bearing area by the prosthesis
Ensure prosthesis covers the primary load bearing sites

Question 5

How to improve stability of the maxillary denture?

Answer 5

Optimum border seal
Effective post-dam
Full upper denture in centric occlusion - even contacts on both sides

Question 6

What are the solutions for overbite of upper complete to lower natural incisors?

Answer 6

Reduction of the incisal edges of the natural teeth - not always possible due to sensitivity
Re-site the upper denture teeth - putting them higher up - see less upper denture teeth
May improve the function but compromise on aesthetics

Question 7

What happens if there is no posterior support?

Answer 7

Anterior teeth in contact/ opposition
Denture drops down when eating if only got lower anterior opposing maxillary denture

Question 8

What is the effect of irregular occlusal plane on stability of maxillary denture?

Answer 8

Trauma to upper residual ridge due to uneven contacts