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http://dx.doi.org/10.4047/jkap.2010.48.1.28

The effects of local factors on the survival of dental implants: A 19 year retrospective study  

Kim, Sung-Hoi (Department of Prosthetic Dentistry, The Graduate School, Yonsei University)
Kim, Sun-Jai (Department of Prosthetic Dentistry, The Graduate School, Yonsei University)
Lee, Keun-Woo (Department of Prosthetic Dentistry, The Graduate School, Yonsei University)
Han, Dong-Hoo (Department of Prosthetic Dentistry, The Graduate School, Yonsei University)
Publication Information
The Journal of Korean Academy of Prosthodontics / v.48, no.1, 2010 , pp. 28-40 More about this Journal
Abstract
Purpose: The aim of this retrospective study was to provide long-term data about the correlation between multifactorial local factors and the survival of implants. Material and methods: During 19 years (1991 to 2009), 2796 implants were placed in 879 patients. From dental charts and radiographs, the following data were collected: patient's age at implant placement, gender, implant system, surface, length, diameter, location of implant placement, bone quality, primary stability, type of prosthesis. The correlations between these data and implant survival were analyzed. Statistical analysis was performed using Kaplan-Meier survival analysis, Chi-square test, odds ratio. Results: 1. Among the 2796 implants, 150 implants failed that resulted in a cumulative survival rate of 94.64%. The cumulative survival rate of smooth surface implants (91.76%) was lower than rough surface implants (96.02%). 2. Anatomic location, implant surface, diameter of smooth surface implant, primary stability, type of prosthesis, patient's age and gender were significantly associated with implant survival (P < .05). 3. No significant difference in implant survival was found in relation to the following factors: implant length, bone quality, diameter of rough surface implants and type of rough surface according to implant manufacturer (P < .05). Conclusions: Local factors such as anatomic location, implant surface, diameter of smooth surface implant, primary stability and type of prosthesis have a significant effect on implant survival.
Keywords
Dental implants; Implant failure; Rough surface implants; Smooth surface implants; Location; Primary stability; Type of prosthesis;
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