Prosthodontics & Occlusion · single question
In removable partial denture design, the area of a tooth cervical (gingival) to its height of contour is the:
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Correct answer: A. Undercut
- A. Correct. The portion of a tooth GINGIVAL to the height of contour (survey line) is the undercut, which provides retention for clasp terminals.
- B. The survey line (height of contour) is the boundary itself, not the undercut area.
- C. A guide plane is a parallel surface that guides insertion/removal.
- D. A rest seat is a prepared recess to support a rest, not the undercut.
Note: Source provided only the term 'undercut'; reconstructed as a definition question.
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