RPD Review Questions

Answer to Question #70


The correct answer is

Incorrect. Class I RPDs always have an axis of rotation.

Incorrect. Class II RPDs always have an axis of rotation.

Correct. Class III RPDs never have an axis of rotation.

Incorrect. Class IV RPDs usually do not have an axis of rotation but many people consider that if all the incisors and the canines are missing, the anterior edentulous area is so extensive that there is essentially an "anterior extension" and an accompanying axis of rotation.