title: Long-term outcomes of dental implants placed in elderly patients: a retrospective clinical and radiographic analysis.
abstract: OBJECTIVE
  The aim of this retrospective study was to determine the clinical and the radiographic outcomes of dental implants placed in elderly people older than 65 years.
  
  
  METHODS
  In total, 902 implants in 346 patients (age: 65-89 years) were followed up for 2-17 years following the implant surgery. The survival rate of these implants was recorded and analyzed. Changes in marginal bone levels were also analyzed in serial radiographs, and Cox regression analysis for implant loss was performed.
  
  
  RESULTS
  The survival rates were 95.39% and 99.98% in the implant- and patient-based analyses, respectively (involving a total of 29 implant failures), and the marginal bone loss at the implants was 0.17 ± 0.71 mm (mean ± SD). The number of failures was greatest in patients aged 65-69 years. The Cox regression with shared frailty analysis showed that implant loss was significantly greater in those aged 65-69 years than in those aged 70-74 years (P < 0.05), and it varied between specific implant systems.
  
  
  CONCLUSIONS
  Within the limitations of this retrospective study, it was concluded that implant therapy can be successfully provided to elderly patients and that age alone does not seem to affect the implant survival rate.
authors.affiliation: Department of Periodontology, College of Dentistry, Dankook University, Cheonansi, Korea.
authors.forename: Jung-Chul
authors.initials: JC
authors.lastname: Park
authors.affiliation: Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, Korea.
authors.forename: Won-Sun
authors.initials: WS
authors.lastname: Baek
authors.affiliation: Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, Korea.
authors.forename: Seong-Ho
authors.initials: SH
authors.lastname: Choi
authors.affiliation: Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, Korea.
authors.forename: Kyoo-Sung
authors.initials: KS
authors.lastname: Cho
authors.affiliation: Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, Korea.
authors.forename: Ui-Won
authors.initials: UW
authors.lastname: Jung
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D008297:Male; D011861:Radiography, Dental; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants
keywords: aging; dental implant; risk factors; survival analysis