Prosthodontics & Occlusion · single question
What is the MAIN function of a precision attachment in a removable partial denture?
Show answer and explanation
Correct answer: A. Retention
A precision (intracoronal) attachment primarily provides retention for the prosthesis while eliminating visible clasps; improved esthetics is a secondary benefit, not the principal mechanical function.Other options: Esthetics is an advantage but not the primary function; support and resistance are provided mainly by rests and tooth/tissue contact, not the attachment itself.Key exam takeaway: Precision attachment = retention (with an esthetic advantage of no visible clasps).
- A. Stability resists lateral (horizontal) movement of the denture. While precision attachments contribute to stability, it is not their primary function.
- B. Reciprocation counteracts the lateral forces of clasps — it is a function of conventional clasp design, not precision attachments.
- C. Support prevents vertical movement of the denture toward the tissues — this is primarily provided by rests on abutment teeth.
- D. RETENTION is the primary function of a precision attachment. It prevents the denture from being dislodged in an occlusal (away from tissue) direction. Precision attachments (interlocking male-female components) provide excellent retention without visible clasps. ✓
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