Implants with peri-implantitis reveal a complex microbiota that includes conventional periodontal pathogens. The similarity in the microbiota between teeth and implants in partially edentulous patients has been confirmed by several studies comparing the microbiota between both abutment types at 6 months or later after abutment insertion.
Methods: In the present study, we tried to identify the similarities in microbiota of teeth and fresh peri-implant sulci in patients with a history of periodontisis. Results: The ratio of anaerobic/aerobic species was relatively constant for both types of pockets, with a lower
bacterial load in peri-implant sulci. Conclusions: The patients with a preexistent periodontal disease represent a risk for developing periimplantitis that should not be neglected, since the colonization of the fresh peri-implant pockets involve periodontal pathogens