RPD Review Questions

Answer to Question #93


The correct answer is

Incorrect. The I-bar should release and thus, should create little danger of torquing the abutment.

Incorrect. Since the WW arm is flexible, it provides some stress-breaking effect and the danger of torquing the abutment should be minimized.

Correct. Even though the RPA clasp has a mesial rest, the originating portion of the circumferential clasp will lie above the height of contour and will act like a distal rest on an inclined plane. The tip of the cast arm will now lie in front of the axis of rotation.

Incorrect. One of the other choices is much more potentially damaging to the abutment.