Implants · single question

What is the minimum distance between TWO adjacent implants?

  1. 3 mm
  2. 7 mm
  3. 6 mm
  4. 2 mm
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Correct answer: A. 3 mm

3 mm (A) is the minimum recommended distance between two adjacent implants. This distance is necessary to:
• Preserve the interimplant bone crest height (prevents bone resorption from adjacent implants' biological width/bone remodeling)
• Allow proper tissue healing and avoid compromised blood supply
• Provide space for hygiene access between implant-supported restorations
• Prevent fusion of the peri-implant bone remodeling zones

• Implant to natural tooth: minimum 1.5-2 mm (to preserve the natural tooth's PDL and crestal bone).
• These are minimum distances — clinical situations often require more space for esthetic and prosthetic reasons.
• The interimplant distance affects whether individual crowns or a splinted prosthesis is needed.

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