title: Outcome of dental implants in partially edentulous patients with and without a history of periodontitis: a 5-year interim analysis of a cohort study.
abstract: OBJECTIVE
  To evaluate the outcome of dental implants placed in partially edentulous patients with a history of severe periodontitis (SP), moderate periodontitis (MP) and no periodontitis (NP).
  
  
  METHODS
  Sixty-two partially edentulous patients were consecutively enrolled in this study. Patients were divided into three groups according to their initial periodontal conditions, assessed with a modified Periodontal Screening and Recording (PSR) index: 26 patients were in the SP group, 7 in the MP group, and 29 in the NP group. Patients requiring periodontal treatment were treated prior to implantation. Various dental implants and procedures were used. In the SP group 129 implants were placed, 26 were placed in the MP group, and 72 in the NP group. Outcome measures were prosthetic success, implant survival, prevalence of peri-implantitis and mean peri-implant bone level changes on periapical radiographs.
  
  
  RESULTS
  Six patients dropped out, two from each group, at 5 years. Two implants and their prosthesis failed with peri-implantitis in one patient and two implants were successfully treated for periimplantitis in another patient in the SP group. After 5 years, patients affected by SP and MP lost on average twice the amount of peri-implant bone compared with healthy patients (2.6 mm versus 1.2 mm). This difference was highly statistically significant.
  
  
  CONCLUSIONS
  Patients with a history of SP and MP lose more peri-implant bone than periodontally healthy patients and might be at higher risk for peri-implantitis and implant failures.
authors.affiliation: Oral Surgery, Unit of Oral Surgery, Department of Medicine, Surgery and Dentistry, San Paolo Hospital, University of Milan, Milan, Italy.
authors.forename: Claudio
authors.initials: C
authors.lastname: Gatti
authors.forename: Fulvio
authors.initials: F
authors.lastname: Gatti
authors.forename: Matteo
authors.initials: M
authors.lastname: Chiapasco
authors.forename: Marco
authors.initials: M
authors.lastname: Esposito
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000145:classification / Q000000981:diagnostic imaging; D015331:Cohort Studies; D015921:Dental Implants; D019232:Dental Restoration Failure; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D010512:Periodontal Index; D010514:Periodontal Pocket / Q000145:classification; D010518:Periodontitis / Q000145:classification / Q000628:therapy*; D011446:Prospective Studies; D016300:Radiography, Bitewing; D012008:Recurrence; D012307:Risk Factors; D016019:Survival Analysis; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants