RPD Review Questions

Answer to Question #16


The correct answer is

Rests must be placed in prepared rest seats. This is particularly important on anterior teeth where, without prepared rest seats, rests lie on inclined planes. Downward pressure on the rest will tend to push the abutment buccally.

Note: the rest could be a little wider incisogingivally and it could also be a little thicker. However, these problems pale in comparison to the fact that there is no rest preparation.