RPD Review Questions

Answer to Question #68


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Incorrect. If the molars were lost, the I-bars would be cast clasps in front of the axis of rotation. It is possible that I-bars could be used but the rests should be changed to the mesial.

Incorrect. The undercuts are not in the appropriate location for modified T-bars. In addition, if the molars were lost, the cast clasps would be in front of the axis of rotation.

Incorrect. If the molars were lost, the tips of the cast circumferential clasps would be in front of the axis of rotation.

Correct. If the molars were lost, the WW clasps would provide stress relief for the abutments (due to their flexibility) when the extension base moves toward the residual ridge.