Resumo

QUINTEROS BORGARELLO, M. et al. Microbiological study of the peri-implantitis: presentation of 9 clinical case. Avances en Periodoncia [online]. 2000, vol.12, n.3, pp.137-150. ISSN 2340-3209.

Objective: Peri-implantitis is an inflammatory process affecting the tissues around an osseointegrated implant in function, resulting in loss of supporting bone. The aim of this study was to evaluate the subgingival microbiota at dental implants associated with peri-implantitis treated in our service. A total of 16 implants of 9 patients were studied. In all cases implants were under functional conditions. Materials and Methods: We studied 16 peri-implantitis in 9 patients; in each patient subgingival bacterial samples were obtained using paper-points or inflammatory soft tissue, and subjected to microbiological analysis by culture. Each site was sample by serting paper points into the sulcus around the implant with peri-implantitis, in 14 implants, or by inflammatory soft tissue, in other 2 implants. Then the samples were grown in brain heart infusion broth. Results: We found Gram-negative anaerobic bacteria, Fusobacterium nucleatum, in one sample, Prevotella oralis, in one sample, Peptostreptococcus, in one sample, and Stomatococcus, in 3 samples. In 9 samples were impossible to found one predominant bacteria. Antimicrobial susceptibility of isolates was determined. Antibacterial activity of amoxicillin-clavulanate was significantly higher than with other antimicrobials tested like amoxicillin or metronidazole. Conclusions: This study found that microbiota associated with periimplantitis are Stomatococcus, Prevotella oralis, Peptostreptococcus and Fusobacterium nucleatum. Actinobacillus actinomycetemcomitans was not detected in any of the sampIes. Possible risk factors of peri-implantitis were hydroxyapatite, dental implants of 3,25 mm of diameter or distal position of implants in maxillary prosthetic superstructure.

Palavras-chave : Dental implants; peri-implantitis/microbiology.

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