title: Peri-implant bone loss of dental implants with platform-switching design after 5 years of loading: a cross-sectional study.
abstract: OBJECTIVE
  The aim of this cross-sectional study was to estimate bone loss of implants with platform-switching design and analyze possible risk indicators after 5 years of loading in a multi-centered private practice network.
  
  
  METHODS
  Peri-implant bone loss was measured radiographically as the distance from the implant shoulder to the mesial and distal alveolar crest, respectively. Risk factor analysis for marginal bone loss included type of implant prosthetic treatment concept and dental status of the opposite arch.
  
  
  RESULTS
  A total of 316 implants in 98 study patients after 5 years of loading were examined. The overall mean value for radiographic bone loss was 1.02 mm (SD ± 1.25 mm, 95% CI 0.90- 1.14). Correlation analyses indicated a strong association of peri-implant bone loss > 2 mm for removable implant-retained prostheses with an odds ratio of 53.8.
  
  
  CONCLUSIONS
  The 5-year-results of the study show clinically acceptable values of mean bone loss after 5 years of loading. Implant-supported removable prostheses seem to be a strong co-factor for extensive bone level changes compared to fixed reconstructions. However, these results have to be considered for evaluation of the included special cohort under private dental office conditions.
authors.forename: Tim
authors.initials: T
authors.lastname: Joda
authors.forename: Ioanna
authors.initials: I
authors.lastname: Michelaki
authors.forename: Guido
authors.initials: G
authors.lastname: Heydecke
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology*; D003430:Cross-Sectional Studies; D059605:Dental Implant-Abutment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D012307:Risk Factors