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Implants · single question

What is the minimum mesiodistal space required between two adjacent natural teeth for implant placement?

  1. 5 mm
  2. 10 mm
  3. 3 mm
  4. 7 mm
Show answer and explanation

Correct answer: D. 7 mm

Minimum mesiodistal space between natural teeth = 7 mm. Provides room for the implant fixture (~3.5–4.2 mm) + ≥1.5 mm bone on each side (mesial/distal) to prevent adjacent tooth bone loss. Source confirms: '7mm.'
  • A. 5 mm is too narrow for standard implant with proper bone margins bilaterally.
  • B. 10 mm is ample but not the minimum.
  • C. 3 mm is the minimum bone needed on ONE side of the implant — not the total space.
  • D. CORRECT. 7 mm minimum mesiodistal space for implant between two natural teeth.

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