title: Long-term implant success at the Academy for Oral Implantology: 8-year follow-up and risk factor analysis.
abstract: OBJECTIVE
  Rehabilitation of the incomplete dentition by means of osseointegrated dental implants represents a highly predictable and widespread therapy; however, little is known about potential risk factors that may impair long-term implant success.
  
  
  METHODS
  From 2004 to 2012, a total of 13,147 implants were placed in 4,316 patients at the Academy for Oral Implantology in Vienna. The survival rates after 8 years of follow-up were computed using the Kaplan-Meier method, and the impact of patient- and implant-related risk factors was assessed.
  
  
  RESULTS
  Overall implant survival was 97% and was not associated with implant length (P=0.930), implant diameter (P=0.704), jaw location (P=0.545), implant position (P=0.450), local bone quality (P=0.398), previous bone augmentation surgery (P=0.617), or patient-related factors including osteoporosis (P=0.661), age (P=0.575), or diabetes mellitus (P=0.928). However, smoking increased the risk of implant failure by 3 folds (P<0.001) and a positive history of periodontal disease doubled the failure risk (P=0.001).
  
  
  CONCLUSIONS
  Summing up the long-term results of well over 10,000 implants at the Academy for Oral Implantology in Vienna it can be concluded that there is only a limited number of patients that do not qualify for implant therapy and may thus not benefit from improved quality of life associated with fixed implant-retained prostheses.
authors.affiliation: Academy for Oral Implantology, Vienna, Austria.
authors.forename: Dieter
authors.identifier: 0000-0002-6731-6160
authors.initials: D
authors.lastname: Busenlechner
authors.affiliation: Academy for Oral Implantology, Vienna, Austria.
authors.forename: Rudolf
authors.identifier: 0000-0001-9373-2101
authors.initials: R
authors.lastname: Fürhauser
authors.affiliation: Academy for Oral Implantology, Vienna, Austria.
authors.forename: Robert
authors.identifier: 0000-0003-0989-5069
authors.initials: R
authors.lastname: Haas
authors.affiliation: Academy for Oral Implantology, Vienna, Austria.
authors.forename: Georg
authors.identifier: 0000-0003-4998-2829
authors.initials: G
authors.lastname: Watzek
authors.affiliation: Academy for Oral Implantology, Vienna, Austria.
authors.forename: Georg
authors.identifier: 0000-0001-8869-4059
authors.initials: G
authors.lastname: Mailath
authors.affiliation: Academy for Oral Implantology, Vienna, Austria.
authors.forename: Bernhard
authors.identifier: 0000-0002-2617-0353
authors.initials: B
authors.lastname: Pommer
keywords: Dental implants; Endosseous dental implantation; Implant-supported dental prosthesis; Periodontal diseases; Risk factors; Survival analysis