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Prosthodontics & Occlusion · single question

What is the effect of a gingival retraction cord on the gingival tissues?

  1. Increased keratinization of the free gingiva
  2. Permanent apical migration of the attachment
  3. Chemical cauterization of the sulcular epithelium
  4. Vertical and lateral displacement of the gingival margin
Show answer and explanation

Correct answer: D. Vertical and lateral displacement of the gingival margin

  • A. Retraction does not alter keratinization.
  • B. Permanent apical migration is a COMPLICATION of improper technique, not the intended effect.
  • C. Cauterization describes electrosurgery or chemical agents, not mechanical cord retraction.
  • D. Correct. Retraction cord produces TEMPORARY VERTICAL (apical) and LATERAL displacement of the free gingival margin, opening the sulcus so impression material can capture the finish line. Medicated cords add hemostasis. Displacement should be transient — leaving cord in place too long, or packing below the junctional epithelium, risks permanent recession.

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