Which component is also known as a reciprocating arm?

Which component is also known as a reciprocating arm?

• A. Rest
• B. Minor connector
• C. Bracing arm
• D. Retentive arm

Answer: (C)

In a clasp system for a removable partial denture, the reciprocal action is provided by the brace that sits against the tooth to counteract the forces from the retentive arm. That reciprocal arm is also known as the bracing arm because its job is to brace the tooth and stabilize the abutment during insertion, removal, and function. So the component that doubles as a reciprocating arm is the bracing arm. The rest serves as vertical support to the tooth, the minor connector links parts of the framework, and the retentive arm engages undercuts to retain the denture—not to brace the tooth.

In a clasp system for a removable partial denture, the reciprocal action is provided by the brace that sits against the tooth to counteract the forces from the retentive arm. That reciprocal arm is also known as the bracing arm because its job is to brace the tooth and stabilize the abutment during insertion, removal, and function. So the component that doubles as a reciprocating arm is the bracing arm. The rest serves as vertical support to the tooth, the minor connector links parts of the framework, and the retentive arm engages undercuts to retain the denture—not to brace the tooth.