What is the most common bacterial cause of peri-implantitis?

• A. Staphylococcus
• B. Prevotella
• C. Streptococcus
• D. Fusobacterium

Answer: (B)

Peri-implantitis, an inflammatory condition affecting the soft and hard tissues surrounding dental implants, is often associated with specific bacterial species. The most common bacterial cause of peri-implantitis is Prevotella, a genus of anaerobic bacteria known to play a significant role in periodontal diseases.

Prevotella species are frequently identified in periodontal tissues and are implicated in mixed infections characterized by inflammation and tissue destruction. Their presence is associated with the biofilm formation on dental implants, which can lead to the inflammatory process of peri-implantitis. The anaerobic nature of Prevotella allows it to thrive in the subgingival environment surrounding implants, further contributing to the disease process.

Other bacterial species, while they may also be present in peri-implantitis cases, do not have the same level of association or evidence linking them directly to the onset of this condition as Prevotella. For instance, Staphylococcus is more typical in surgical site infections than in peri-implantitis specifically, while Streptococcus, though present in oral flora, does not hold the same association with peri-implant disease processes. Fusobacterium can be involved in periodontal diseases but is not the primary bacterium responsible for peri-implantitis complications.

Understanding the role