Restorative & Materials · single question
Which crown margin is best for maintaining biological health?
Show answer and explanation
Correct answer: A. Supragingival (above the gingival margin) — about 1 mm above is ideal
- A. Correct. Supragingival crown margins (ideally ~1 mm above the gingival margin) are best for periodontal/biological health since they are easier to clean, finish accurately, and avoid violating the biologic width.
- B. Subgingival margins increase risk of biologic width violation, plaque accumulation, and periodontal inflammation if not carefully managed.
- C. Margins placed exactly at the gingival margin can still be more difficult to maintain/finish precisely than a supragingival margin and carry more periodontal risk than option A.
Note: Margin placement: 1 mm supragingival is healthiest for periodontal biology.
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