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Periodontics · single question

Peri-implantitis is most strongly associated with which type of bacterial flora, similar to that seen in periodontitis?

  1. Predominantly gram-negative anaerobic bacteria
  2. Predominantly gram-positive aerobic bacteria
  3. Predominantly fungal organisms
  4. Predominantly viral pathogens
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Correct answer: A. Predominantly gram-negative anaerobic bacteria

Peri-implantitis shares a microbial profile broadly similar to chronic periodontitis, dominated by gram-negative anaerobic bacteria (including red-complex-type organisms), reflecting a comparable inflammatory, biofilm-driven destructive process around the implant.

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