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Factors affecting the survival of implants: a long-term retrospective study

임플란트의 생존에 영향을 미치는 요인에 대한 장기간의 후향적 연구

  • Song, Susanna (Department of Periodontology and Research Institute of Oral Sciences, Gangneung-Wonju National University College of Dentistry) ;
  • Lee, Jae-Kwan (Department of Periodontology and Research Institute of Oral Sciences, Gangneung-Wonju National University College of Dentistry) ;
  • Um, Heung-Sik (Department of Periodontology and Research Institute of Oral Sciences, Gangneung-Wonju National University College of Dentistry) ;
  • Chang, Beom-Seok (Department of Periodontology and Research Institute of Oral Sciences, Gangneung-Wonju National University College of Dentistry)
  • 송수산나 (강릉원주대학교 치과대학 치주과학교실) ;
  • 이재관 (강릉원주대학교 치과대학 치주과학교실) ;
  • 엄흥식 (강릉원주대학교 치과대학 치주과학교실) ;
  • 장범석 (강릉원주대학교 치과대학 치주과학교실)
  • Received : 2014.12.17
  • Accepted : 2015.03.02
  • Published : 2015.03.31

Abstract

Purpose: The aim of the present study was to evaluate the long-term survival of implants retrospectively and determine the risk factors associated with implant failure. Materials and Methods: Of all implants that were placed at the Department of Periodontology of the Dental Hospital of Gangneung-Wonju National University from January 1998 to December 2012, 2265 implants that were followed up until June 2013 were included in this study. Data were collected from clinical and radiographic examinations from previous visits. The information gathered included gender, age, smoking status, implant diameter, implant length, surface of implant, location of implant within the dental arch, surgical techniques and existence of complications. Results: The survival rate before loading was 98.9%. The cumulative survival rate after 5 years of loading was 97.2%, and after 15 years of loading was 95.2%. In a simple logistic regression analysis, gender (P = 0.016), smoking status (P = 0.001), location of implant (P = 0.020) and existence of complications (P = 0.002) were statistically associated with implant failure and included in the multiple regression analysis. As a result of multiple logistic regression analysis, the variables statistically associated with implant failure (P < 0.05) were smoking status (P = 0.049) and existence of complications (P < 0.001). Conclusion: The cumulative survival rate of dental implants after 15 years of loading was 95.2% and that the variables statistically associated with implant failure were smoking status and existence of complications.

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