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Prosthodontics & Occlusion · single question

A student states: 'The main function of a precision attachment is retention, and the main advantage over conventional clasps is esthetics.' Which part of this statement is correct?

  1. Both parts are correct — retention is the function and esthetics is the main advantage
  2. Only the first part — retention is the main function, but improved support is the main advantage
  3. Both parts are correct but incomplete — precision attachments also improve stability
  4. Only the second part — esthetics is the main advantage, but the primary function is retention AND stability
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Correct answer: A. Both parts are correct — retention is the function and esthetics is the main advantage

Precision attachments consist of a male and female component connecting a removable partial denture (RPD) to fixed abutment crowns. Their PRIMARY FUNCTION is retention — they hold the prosthesis in place without visible metal clasps. The PRIMARY ADVANTAGE over conventional clasps is ESTHETICS — no metal clasp arms visible in the smile zone. Additional advantages include improved stability, psychological acceptance, and more even load distribution. However, they require significant tooth preparation, are costly, and place greater stress on abutment teeth. The statement is therefore correct: retention = main function; esthetics = main advantage.

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