Support For The Distal Extension Base

Question 1

Factors influencing the support ofa distal extension base

Answer 1

Contour and quality of a residual ride
Extent of residual ridge coverage by the denture base
Type and accuracy of the impression registration
Accuracy of the fir of the denture base
Design of the partial denture framework
Total occlusal load applied

Question 2

Stress bearing areas in mandible

Answer 2

1. Buccal shelf region : resist vertical load
2. Slopes of the residual ridge : resist horizontal or offvertical force
3. Crest of the residual ridge

Question 3

Stress bearing areas of maxilla

Answer 3

1. Crestal area of the residual ridge : resist vertical directed force
2. Immediate buccal and lingual sloped of the residual ridge : small resistance to vertically directed force

Question 4

Relief must be provided on the ___ and ___

Answer 4

Incisive papilla and medial palatal raphe

Question 5

The brader the coverage, the greaer the distribution of the load, which results in ___ load per unit area

Less or more?

Answer 5

Less