RPD Review Questions
Incorrect. The tip of the clasp would lie in front of the axis of rotation and the cast clasp has minimal flexibility.
Correct. You must use a distal rest because of the angulation of the tooth. Otherwise the guide plate will pre-empt the planned mesial rest and will act like a rest on an inclined plane. Attempts to physiologically relieve the guide plate would result in a space between the guide plate and the distal proximal surface of the tooth creating an unacceptable food trap. Once you have decided to use a distal rest, you must use a clasp with maximum flexibility (WW).
Incorrect. Because of the tilt of the tooth, the distal guide plate will pre-empt the mesial rest and will act like a rest on an inclined plane. The I-bar would now be a cast clasp in front of the axis of rotation.
Incorrect. The I-bar would be a cast clasp in front of the axis of rotation.