title: Transmission of periodontal disease-associated bacteria from teeth to osseointegrated implant regions.
abstract: OBJECTIVE
  The presence of periodontopathic bacteria is a risk factor for peri-implantitis. The present study examined colonization by periodontopathic bacteria and their transmission from periodontal pockets to osseointegrated implant sulcus.
  
  
  METHODS
  Plaque samples were collected from 105 sites in the 15 patients who participated in the study. Colonization by these bacteria was examined by polymerase chain reaction (PCR) and culture. The transmission of periodontopathic bacteria from periodontal sites of natural teeth to the implant sulcus was analyzed by pulsed field gel electrophoresis (PFGE).
  
  
  RESULTS
  The PCR detection rates of Porphyromonas gingivalis, Prevotella intermedia, Actinobacillus actinomycetemcomitans, Bacteroides forsythus, and Treponema denticola were 80.0%, 53.3%, 46.7%, 60.0% and 40.0%, respectively. Colonizations by P gingivalis and A actinomycetemcomitans were statistically correlated with periodontal pockets and implant sulcus regions (P < .01). The PFGE patterns of the P gingivalis strains isolated from each patient were identical, but differed from those from other patients. The PFGE patterns of P intermedia strains were identical in 2 out of 3 patients.
  
  
  CONCLUSIONS
  These analyses indicated that there appeared to be transmission of P gingivalis and P intermedia from the periodontal pocket to the peri-implant region.
  
  
  CONCLUSIONS
  Elimination of these periodontal pathogens from the patient's oral cavity before administering dental implant treatment may inhibit colonization by these pathogens and reduce the risk of peri-implantitis.
authors.affiliation: Department of Removable Partial Prosthodontics, Tokyo Dental College, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Sumida
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Ishihara
authors.forename: Masataka
authors.initials: M
authors.lastname: Kishi
authors.forename: Katsuji
authors.initials: K
authors.lastname: Okuda
mesh_terms: D000328:Adult; D000368:Aged; D016976:Aggregatibacter actinomycetemcomitans / Q000302:isolation & purification; D001439:Bacteroides / Q000302:isolation & purification; D016009:Chi-Square Distribution; D015169:Colony Count, Microbial; D015921:Dental Implants / Q000382:microbiology*; D003773:Dental Plaque / Q000382:microbiology; D016521:Electrophoresis, Gel, Pulsed-Field; D005260:Female; D006090:Gram-Negative Bacteria / Q000145:classification*; D006801:Humans; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation / Q000601:surgery; D008297:Male; D008875:Middle Aged; D016348:Osseointegration; D010514:Periodontal Pocket / Q000382:microbiology; D010518:Periodontitis / Q000382:microbiology*; D016133:Polymerase Chain Reaction; D016966:Porphyromonas gingivalis / Q000302:isolation & purification; D018713:Prevotella intermedia / Q000302:isolation & purification; D014070:Tooth / Q000382:microbiology*; D014208:Treponema / Q000302:isolation & purification
chemical_list: D015921:Dental Implants