S-Space College of Dentistry/School of Dentistry (치과대학/치의학대학원) Dept. of Dental Science(치의과학과) Theses (Master's Degree_치의과학과)
Risk Factors of Early Implant Failure: A Retrospective Study
임플란트 초기실패의 위험요소: 후향적 연구
- 치의학대학원 치의과학과
- Issue Date
- 서울대학교 대학원
- 학위논문 (석사)-- 서울대학교 대학원 : 치의과학과 치주과학 전공, 2016. 2. 류인철.
The aim of this retrospective study was to assess the potential risk factors that lead to early implant failure.
Materials and methods
The medical records of patients who received implant (Bränemark System, Nobel Biocare, Gothenburg, Sweden) surgery within the period 2008–2014 at the Department of Dentistry, Asan Medical Center, were carefully reviewed. Data collection and analysis mainly focused on systemic, anatomic, implant, and operative factors. The outcome variable was early implant failure.
In 321 patients, including 150 women and 171 men, whose mean age was 54.4 years (range, 18-81 years), 1014 implants were installed. Thirty-four implants in 29 patients failed to osseointegrate, corresponding to an early implant failure rate of 3.4%. The early implant failures were significantly associated with smoking habit (p < 0.05), implant site (p < 0.05), bone quality (p < 0.05), timing of implant surgery (p < 0.01), and horizontal ridge augmentation (p < 0.05). Multivariate logistic regression analysis established the significance of smoking habit (Odds ratio (OR) = 2.7, p < 0.05), bone quality (OR = 2.0, p < 0.05), timing of implant surgery (OR = 3.9, p < 0.01), and horizontal ridge augmentation (OR = 2.3, p < 0.05).
The risk factors of early implant failure were smoking habit, bone quality, timing of implant surgery, and horizontal ridge augmentation. Therefore, such systemic and local factors should be considered in planning implant installation in order to prevent early implant failure.