Multifactorial Risk Assessment for the Survival of Endodontically Treated Abutments in Removable Partial Dentures: A Retrospective Study
10.5856/JKDS.2026.19.1.23
- Author:
Seo-Yeon LEE
1
;
Jin-Young JANG
;
Hye-Jin KIM
;
Ran-Ah KIM
;
Sun-Ho KIM
;
Jeong-Hee KIM
Author Information
1. Department of Conservative Dentistry, Veterans Health Service Medical Center, Seoul, Korea
- Publication Type:ORIGINAL ARTICLE
- From:Journal of Korean Dental Science
2026;19(1):23-34
- CountryRepublic of Korea
- Language:English
-
Abstract:
Objective:This study aimed to evaluate the survival of removable partial dentures (RPDs) abutment teeth that had undergone root canal treatment (RCT) and to identify the factors influencing survival.
Materials and Methods:Records from the Veterans Health Service Medical Center were reviewed to identify patients who received RPDs between 2014 and 2015 and had root canal-treated abutment teeth. Preoperative variables included patient demographics, tooth location, and periapical radiolucency, while postoperative variables included RPD classification, opposing dentition, crown-root ratio (CRR), root canal filling quality, post placement, and restoration type. Statistical analysis was performed using the Kaplan-Meier method and Cox proportional hazards models.
Results:A total of 776 root canal-treated abutment teeth from 341 patients using RPDs (mean age, 72.03 years) were included. In the multivariate analysis, tooth-related conditions such as arch type and tooth location, presence of a periapical lesion, and presence of a core were significantly associated with poor prognosis. Kaplan-Meier survival analysis revealed that the 3-, 5-, 7-, and 10-year survival rates for all teeth were 93.5%, 84.4%, 77.1%, and 60.0%, respectively.
Conclusion:Arch type and tooth position, preoperative periapical radiolucency, and type of restoration are significantly associated with prognosis in patients with RPDs in whom the abutment teeth have previously undergone RCT.
