Resin composite repair for implant-supported crowns

Author(s)

Bonfante, Estevam A. ; Suzuki, Marcelo ; Hirata, Ronaldo ; Bonfante, Gerson ; Fardin, Vinicius P. ; Coelho, Paulo G.

• Document type: Journal article
• Source: JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS; v. 105, n. 6, p. 1481-1489, AUG 2017.
• Web of Science Citations: 1

Abstract

This study evaluated the reliability of implant-supported crowns repaired with resin composites. Fifty-four titanium abutments were divided in three groups (n = 18 each) to support resin nanoceramic molar crowns, as follows: (LU) (Lava Ultimate, 3M ESPE); LU repaired with either a direct or an indirect resin composite. Samples were subjected to mouth-motion accelerated-life testing in water (n 5 18). Cumulative damage with a use stress of 300 N was used to plot Weibull curves for group comparison. Reliability was calculated for a mission of 100,000 cycles at 400 N load. Beta values were 0.83 for LU, 0.31 and 0.27 for LU repaired with Filtek and Ceramage, respectively. Weibull modulus for LU was 9.5 and eta = 1047 N, m = 6.85, and eta = 1002 N for LU repaired with Ceramage, and m = 4.65 and eta = 766 N for LU repaired with Filtek (p < 0.10 between LU and LU repaired with Filtek). Reliability at 400 N was 100% for both LU and LU repaired with Ceramage which were significantly higher than LU Filtek repair (32%). LU restored crowns failed cohesively. Fractures were confined within the restored material, and detailed fractography is presented. The performance of resin nanoceramic material repaired with an indirect composite was maintained after accelerated-life testing compared to unrepaired controls. (C) 2016 Wiley Periodicals, Inc. (AU)

• FAPESP's process: 14/22859-6 - Effect of framework design of fatigued zirconia 3-unit prostheses on the nanomechanical properties
• Grantee: Vinicius Pavesi Fardin
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 10/06152-9 - Reliability and fracture mode of fixed prosthesis made with indirect composites with and without CAD/CAM infrastructure over implant abutments
• Grantee: Estevam Augusto Bonfante
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/20806-0 - Evaluation of damage and failure modes of fixed partial denture of totally ceramic depending on marginal ridge load application
• Grantee: Vinicius Pavesi Fardin
• Support Opportunities: Scholarships in Brazil - Doctorate