Prosthodontics & Occlusion · single question
In a 3-unit fixed bridge (pontic from #2 to #3) with an additional rest on tooth #1, the rest on #1 mainly provides:
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Correct answer: A. Resistance to vertical (occlusal) forces – support
- A. Correct – an occlusal rest transmits vertical loads down the long axis, providing support against vertical forces.
- B. Incorrect – a rest is a functional, not esthetic, feature.
- C. Incorrect – horizontal forces are resisted by reciprocation/bracing elements, not the rest.
- D. Incorrect. A rest transmits occlusal load to the abutment (support); it does not provide retention, which resists vertical dislodging away from the tissue.
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