To avoid transmitting tipping and rotational forces to the abutment, we clasp next to the ______.

To avoid transmitting tipping and rotational forces to the abutment, we clasp next to the ______.

• A. Distal extension
• B. Mesial abutment
• C. Occlusal table
• D. Gingival margin

Answer: (A)

In distal extension cases, the denture base tends to act as a lever and can tip the adjacent abutment under functional loads. Placing the clasp on the tooth closest to the edentulous space (the distal extension) helps resist that tipping by directing the retentive force nearer to the area where the lever would rotate. This arrangement also helps transmit forces more along the long axis of the abutment and reduces rotational moment, improving stability of the appliance. Clasping on a mesial abutment would increase the lever arm and tipping tendency. The occlusal table or gingival margin are not appropriate sites for a primary clasp path or retention and would not effectively oppose tipping or rotational forces.

In distal extension cases, the denture base tends to act as a lever and can tip the adjacent abutment under functional loads. Placing the clasp on the tooth closest to the edentulous space (the distal extension) helps resist that tipping by directing the retentive force nearer to the area where the lever would rotate. This arrangement also helps transmit forces more along the long axis of the abutment and reduces rotational moment, improving stability of the appliance.

Clasping on a mesial abutment would increase the lever arm and tipping tendency. The occlusal table or gingival margin are not appropriate sites for a primary clasp path or retention and would not effectively oppose tipping or rotational forces.