Which clasp setup is described as reverse action?

Which clasp setup is described as reverse action?

• A. Reverse action clasps
• B. Embrasure clasps
• C. Ring clasps
• D. Wrought wire combination clasp

Answer: (A)

Reverse action refers to a clasp design where the retentive arm engages the tooth’s undercut with the action directed in the opposite direction to the tooth’s movement, using a reciprocal arm that works against the insertion path. This creates a distinct mechanism where removal relies on a reverse movement of the clasp, giving controlled retention with balanced forces on the tooth. The term itself is used to name this specific type of clasp, so the option that explicitly states “reverse action clasps” is the correct descriptor. Other clasp types—embrasure, ring, and wrought wire combination—use different configurations and do not carry this reverse-action designation.

Reverse action refers to a clasp design where the retentive arm engages the tooth’s undercut with the action directed in the opposite direction to the tooth’s movement, using a reciprocal arm that works against the insertion path. This creates a distinct mechanism where removal relies on a reverse movement of the clasp, giving controlled retention with balanced forces on the tooth. The term itself is used to name this specific type of clasp, so the option that explicitly states “reverse action clasps” is the correct descriptor. Other clasp types—embrasure, ring, and wrought wire combination—use different configurations and do not carry this reverse-action designation.