RPD Review Questions

Answer to Question #127


The correct answer is

Incorrect. NEVER use cast clasps for teeth which lie in front of the axis of rotation.

Incorrect. Suprabulge clasps are almost always used in this instance.

Correct. WW clasps, because of their flexibility, will tend to place less stress on the anterior abutment when the extension base exhibits functional movement (movement toward the residual ridge).

Incorrect. 0.030 inch undercut is three times what is normally used. Even a wrought wire clasp into this amount of undercut would place significant stress on the abutment during functional movement of the extension base.