Hein De Backer1, Georges Van Maele, Veerle Decock, Linda Van den Berghe. 1. Centre for Special Care, PaeCaMed Research, Unit of Gnathology and Temporomandibular Disorders, Dental School, Faculty of Medicine and Health Sciences, Ghent University, Belgium. Hein.Debacker@skynet.be
Abstract
PURPOSE: This study investigated the long-term survival of posts and cores on root canal-treated (RCT) teeth restored with complete crowns, fixed dental prostheses (FDPs), 3-unit FDPs, and cantilever FDPs (C-FDPs) made over a period of 16 to 20 years in an undergraduate clinic. MATERIALS AND METHODS: Complete treatment and follow-up records of 1,037 complete crowns, 134 three-unit FDPs, 322 FDPs, and 168 C-FDPs were available for analysis. All RCT teeth studied had a post-and-core buildup. Kaplan-Meier survival curves were used to evaluate the different types of fixed restorations. RESULTS: For complete crowns, the estimated survival rates at year 18 were 74.9% for the vital group and 79.4% for the RCT group (P = .602). For 3-unit FDPs, the survival rate at year 20 was 83.2% for the vital group and 60.5% for the RCT group (P = .108). For the FDPs, the survival rate at year 20 was 77.4% for the vital group, while for the RCT group with at least 1 RCT abutment, the survival rate was 56.7% (P = .002). For C-FDPs with vital abutments, the survival rate was 73.5% at year 16, while for the RCT group with at least 1 RCT abutment, the survival rate was 52.3% at year 18 (P < .01). CONCLUSIONS: There was no statistically significant difference in the long-term survival of complete crowns on vital abutments versus post-and-core complete crowns or in the survival of 3-unit FDPs on vital abutments versus those with at least 1 RCT abutment. For FDPs with more than 3 units and C-FDPs, the use of a post-and-core abutment led to significantly more failures.
PURPOSE: This study investigated the long-term survival of posts and cores on root canal-treated (RCT) teeth restored with complete crowns, fixed dental prostheses (FDPs), 3-unit FDPs, and cantilever FDPs (C-FDPs) made over a period of 16 to 20 years in an undergraduate clinic. MATERIALS AND METHODS: Complete treatment and follow-up records of 1,037 complete crowns, 134 three-unit FDPs, 322 FDPs, and 168 C-FDPs were available for analysis. All RCT teeth studied had a post-and-core buildup. Kaplan-Meier survival curves were used to evaluate the different types of fixed restorations. RESULTS: For complete crowns, the estimated survival rates at year 18 were 74.9% for the vital group and 79.4% for the RCT group (P = .602). For 3-unit FDPs, the survival rate at year 20 was 83.2% for the vital group and 60.5% for the RCT group (P = .108). For the FDPs, the survival rate at year 20 was 77.4% for the vital group, while for the RCT group with at least 1 RCT abutment, the survival rate was 56.7% (P = .002). For C-FDPs with vital abutments, the survival rate was 73.5% at year 16, while for the RCT group with at least 1 RCT abutment, the survival rate was 52.3% at year 18 (P < .01). CONCLUSIONS: There was no statistically significant difference in the long-term survival of complete crowns on vital abutments versus post-and-core complete crowns or in the survival of 3-unit FDPs on vital abutments versus those with at least 1 RCT abutment. For FDPs with more than 3 units and C-FDPs, the use of a post-and-core abutment led to significantly more failures.
Authors: Marco Ferrari; Edoardo Ferrari Cagidiaco; Denise Irene Karin Pontoriero; Carlo Ercoli; Kostantinos Chochlidakis Journal: Int J Environ Res Public Health Date: 2022-02-10 Impact factor: 3.390