title: The incidence of peri-implantitis for two different implant systems over a period of thirteen years.
abstract: OBJECTIVE
  To study the incidence of peri-implantitis over 13 years between two types of dental implants.
  
  
  METHODS
  Peri-implantitis incidence was defined as bone loss ≥ 1.0 mm after 1 year, and with BOP or suppuration.
  
  
  RESULTS
  Nineteen subjects with TioBlast AstraTech(™)  (AT) and 22 subjects with machine-etched Brånemark Nobel Biocare(®)  (NB) implants were studied. The incidences of peri-implantitis between years 1 and 7 and between years 7 and 13 were 26.2% and 7.1% for AT implants, and 30.4% and 11.5% for NB implants (NS). A history of periodontitis was a risk for future incidence of peri-implantitis (Likelihood ratio: 4.1, 95% CI: 2.0, 8.4, p < 0.001). Subjects with a history of systemic disease had a higher incidence of peri-implantitis (p < 0.05).
  
  
  CONCLUSIONS
  No difference in the incidence of peri-implantitis over a period of 13 years as an effect implant surface and design was found. Bone loss during the first 7 years after implant installation was greater than thereafter. Microbiological information at year 7 did not predict incidence of peri-implantitis at year 13. Subjects with a previous history of periodontitis and with systemic disease were at higher risk for future incidence of peri-implantitis.
authors.affiliation: Department of Oral Sciences, Kristianstad University Kristianstad, Kristianstad, Sweden. stefan.renvert@hkr.se
authors.forename: Stefan
authors.initials: S
authors.lastname: Renvert
authors.forename: Christel
authors.initials: C
authors.lastname: Lindahl
authors.forename: G
authors.initials: G
authors.lastname: Rutger Persson
mesh_terms: D000368:Aged; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology*; D015921:Dental Implants / Q000009:adverse effects*; D003774:Dental Plaque Index; D017267:Dental Prosthesis Design / Q000009:adverse effects*; D005260:Female; D006801:Humans; D016013:Likelihood Functions; D016015:Logistic Models; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D057873:Peri-Implantitis / Q000209:etiology*; D010512:Periodontal Index; D010518:Periodontitis; D011859:Radiography; D012307:Risk Factors; D013499:Surface Properties
chemical_list: D015921:Dental Implants