RPD Review Questions
Incorrect. Indirect retainers DO NOT function when the patient bites down. It doesn't matter whether the substance is soft or hard.
Incorrect. Same as #1 above.
Correct. Indirect retainers come into play AFTER the patient bites down and then begins to open again. The sticky nature of the material attempts to pull the denture base away from the residual ridge. The indirect retainers prevent the RPD from simply rotating around a line connecting the tips of the direct retainers (clasps, retentive arms). They assist the direct retainers in resisting dislodgement of the prosthesis.