RPD Review Questions

Answer to Question #33


The correct answer is

 

Incorrect. The type of clasp (retentive arm) is not an important consideration in determining whether or not reciprocation occurs.

Incorrect. For reciprocation to occur, retentive and bracing components must contact the teeth at the same time.

Correct. For reciprocation to occur, retentive and bracing components must contact the teeth at the same time. As the retentive tips pass over the height of contour, the rigid opposing elements must maintain contact with the abutments. This issue of TIMING is critical in the concept of reciprocation. If the rigid elements only contact the teeth when the RPD is seated, they will function for bracing but not for reciprocation.

Incorrect. Since #2 is incorrect, #4 is also incorrect.