Indirect retainers go on teeth ______ to the fulcrum line.

Indirect retainers go on teeth ______ to the fulcrum line.

• A. Anterior to the fulcrum line
• B. Posterior to the fulcrum line
• C. On the fulcrum line
• D. Lateral to the fulcrum line

Answer: (A)

Indirect retainers are meant to resist the rotation of an RPD around a fulcrum line formed by the rests. To maximize that resistance, place them on teeth anterior to the fulcrum line (opposite the edentulous area). This anterior position gives a longer lever arm when the denture tends to tip, producing a counteracting moment that helps keep the denture seat properly. Placing an indirect retainer posterior to the fulcrum line or directly on the fulcrum line would provide little effective resistance, whereas an anterior placement aligns with the direction of tipping to stabilize the denture.

Indirect retainers are meant to resist the rotation of an RPD around a fulcrum line formed by the rests. To maximize that resistance, place them on teeth anterior to the fulcrum line (opposite the edentulous area). This anterior position gives a longer lever arm when the denture tends to tip, producing a counteracting moment that helps keep the denture seat properly. Placing an indirect retainer posterior to the fulcrum line or directly on the fulcrum line would provide little effective resistance, whereas an anterior placement aligns with the direction of tipping to stabilize the denture.