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Periodontics · single question

A patient needs root planing. All are correct about root planing EXCEPT:

  1. Remove calculus from dentin
  2. Remove calculus from enamel
  3. Remove calculus from cementum
  4. Smooth the surface of the root
Show answer and explanation

Correct answer: A. Remove calculus from dentin

  • A. 'Remove calculus from dentin' is listed as the EXCEPT answer. Root planing specifically targets CEMENTUM surfaces, removing calculus and contaminated cementum. While the underlying dentin may be exposed in severe attachment loss, the procedure specifically addresses cementum debridement — not dentin removal.
  • B. Root planing involves removal of calculus from CEMENTUM and root surfaces — enamel is the crown portion above the CEJ. In root planing, the clinician debrides SUBGINGIVAL root surfaces. Calculus on enamel is removed during scaling (supragingival), not root planing.
  • C. Root planing DOES involve removing calculus from cementum — this IS correct. It is not the exception.
  • D. Creating a smooth root surface IS a goal of root planing — it removes contaminated cementum and calculus to allow gingival reattachment. This IS correct.

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