Journal
JOURNAL OF CLINICAL PERIODONTOLOGY
Volume 47, Issue 3, Pages 392-403Publisher
WILEY
DOI: 10.1111/jcpe.13251
Keywords
emergence angle; emergence profile; Peri-implantitis; restoration contour; splinted
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Funding
- Seoul National University Dental Hostpital Research Fund [032014-0034]
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Objective To identify the influence of prosthetic features through a comprehensive analysis with other known risk factors. Materials and methods A total of 169 patients (n = implants: 349) was retrospectively included in the present study. Peri-implantitis was diagnosed based on peri-implant bone loss and probing depth. Using radiographs taken 1 and 5 years following prosthesis insertion, the following features were determined: peri-implant marginal bone loss (MBL), emergence angle (EA), emergence profile (EP) and crown/implant ratio (CIR). The splinted position of prosthesis was also recorded. Multivariable generalized estimating equation was used to analyse the influence of each feature on the prevalence of peri-implantitis. The final prediction model was constructed by Cox proportional hazard regression analysis. Results The EA showed a significant correlation with MBL. A statistically greater prevalence of peri-implantitis was observed if EA >= 30 degrees, when EP is convex and in middle implant splinted with both mesial and distal adjacent implants in bone-level implant. A similar correlation was not observed in tissue-level implants. CIR had no significant effect on the prevalence of peri-implantitis. Conclusion Over-contoured implant prosthesis is a critical local confounder for peri-implantitis. The implant splinted to both mesial and distal adjacent implant has a higher risk of peri-implantitis.
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