RPD Review Questions

Answer to Question #7

The correct answer is FALSE

Although the rests on teeth numbers 21 and 28 are indirect retainers, they function when the extension base attempts to move away from the tissues (residual ridge)---not toward the residual ridge as would occur when the patient bites down. These rests are called indirect retainers because they increase the effectiveness of the direct retainers (clasps) when there is an attempt to dislodge the prosthesis.