Restorative & Materials · single question

In removable partial denture (RPD) design, which component(s) are primarily responsible for support (resisting movement of the denture base toward the underlying soft tissue)?

Rests (occlusal, incisal, or cingulum rests), which transfer functional vertical forces to the abutment teeth
Retentive clasp arms, which primarily resist removal of the prosthesis away from the teeth
Major and minor connectors alone, with no role from rests
The denture base acrylic alone, with no metal framework contribution

Show answer and explanation

Correct answer: A. Rests (occlusal, incisal, or cingulum rests), which transfer functional vertical forces to the abutment teeth

Rests (whether occlusal, incisal, or cingulum rests) are the RPD components primarily responsible for SUPPORT — transferring functional occlusal forces to the abutment teeth and helping prevent the prosthesis from sinking into or displacing toward the underlying soft tissue. Retentive clasp arms instead primarily provide RETENTION (resisting removal away from the teeth), while rigid connectors and reciprocal clasp arms contribute to STABILITY (resisting horizontal/lateral forces).

Practice Restorative & Materials questions Restorative & Materials study notes

In removable partial denture (RPD) design, which component(s) are primarily responsible for support (resisting movement of the denture base toward the underlying soft tissue)?

More Restorative & Materials practice questions