Question 158 · LDEK · Partial dentures
“The retentive arm runs on one surface of the abutment tooth (vestibular or lingual) making a hairpin turn. Above the height of contour, it runs almost horizontally to the opposing proximal surface through the whole or almost whole width of the clasp surface, then it turns suddenly down, crosses the height of contour, and runs back to the point of origin and ends at the certain depth of the retentive surface“ is the definition of:
- A. supragingival clasp.
- B. circumferential clasp.
- C. reverse-action clasp.
- D. bar clasp.
- E. independent clasp.
Hint
Trace the arm's course: it travels above the survey line almost to the far side, then dives below it and comes back towards its origin.
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