J Korean Acad Prosthodont.  2023 Apr;61(2):113-124. 10.4047/jkap.2023.61.2.113.

A 10-year retrospective study on the risk factors affecting the success rate of internal connection implants after prosthetic restoration

• Lee S
• Kim MJ

• KMID: 2541796
• DOI: http://doi.org/10.4047/jkap.2023.61.2.113

Abstract

Purpose
. The purpose of this study is to help increase the success rate by analyzing the types and characteristics of implant prosthesis and the survival rate.
Materials and methods
. Among implants placed between 2011 and 2020 at Sanbon Dental Hospital, College of Dentistry, Wonkwang University, a case restored by a prosthetic surgeon was investigated for the characteristics and correlation of failure. The causes of failure were classified as failure of osseointegration, peri-implantitis, fixture fracture, abutment fracture, screw fracture, screw loosening, prosthesis fracture, and loss of prosthesis retention. Prosthetic method, cantilever presence, placement location, etc. were analyzed for their correlation with implant failure. Results analysis was derived through Chi-square test and Kaplan-Meier survival analysis using SPSS ver 25.0 (IBM, Chicago, IL, USA). Results. A total of 2587 implants were placed, of which 1141 implants were restored with Single Crown and 1446 implants with Fixed Partial Denture, and the cumulative survival rate was 88.1%. The success rate of SC was 86.2% (984) and the success rate of FPD was 89.6% (1295), showing statistically significant differences, among which factors that had significant differences were abutment fracture, screw fracture, and screw loosening (P < .05).
Conclusion
. As a result of the 10-year follow-up, more failures occurred due to biomechanical factors than biological factors. Further studies on the success of implants will be needed in the future.

Keyword

Dental implant; Retrospective study; Success rate