Periodontics · single question

What is the color of SUBGINGIVAL calculus and why?

  1. Yellow-white (from salivary minerals)
  2. Dark brown/green/black (from hemoglobin breakdown)
  3. White chalky (from calcium phosphate)
  4. Orange-red (from iron)
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Correct answer: B. Dark brown/green/black (from hemoglobin breakdown)

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