Implants · single question
Which bacteria is PREDOMINANTLY implicated in peri-implantitis?
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Correct answer: A. Gram-negative anaerobes
Gram-negative anaerobes, such as Porphyromonas gingivalis, are primary pathogens in peri-implantitis, causing bone and soft tissue inflammation.
- A. Correct. PERI-IMPLANTITIS microbiota closely resembles that of PERIODONTITIS — predominantly GRAM-NEGATIVE ANAEROBES including Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, Fusobacterium nucleatum, and Prevotella intermedia. These are the same pathogens found in the 'red complex' of periodontal disease.
- B. Incorrect. Gram-negative cocci (Neisseria) are not characteristic of peri-implant infections.
- C. Incorrect. Gram-positive cocci (streptococci) are characteristic of supragingival plaque and gingivitis — not the predominant organisms in peri-implantitis.
- D. Incorrect. Gram-positive bacilli are not the predominant organisms in peri-implantitis.
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