BIOMECHANICAL EVALUATION OF MONOLITHIC FIXED PROSTHESES IMPLANTS SUPPORTED WITH CANTILEVER

• Grant number: 24/09762-5
• Support Opportunities: Scholarships in Brazil - Master
• Start date: May 01, 2025
• End date: June 30, 2026
• Field of knowledge: Health Sciences - Dentistry - Dental Clinics
• Principal Investigator: Joel Ferreira Santiago Junior
• Grantee: Fernanda Leal Vieira
• Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

Implant-supported prostheses with cantilevers (ISP-C) have unfavorable biomechanical aspects compared to prostheses without cantilevers, which is why they are directly related to a higher rate of complications. The objective of this project is to analyze the biomechanical behavior of two new materials, Multilayer Zirconia (Zir Mult) and Resin enriched with Fiberglass (RFV), when used in ISP-C and compare them to the behavior of metal-ceramic (MC) prostheses, using the Digital Image Correlation (DIC) and 3D Finite Element Method (FEM-3D) methodology. Prosthetic situations with high biomechanical demands will be analyzed in this study, including the presence of a mesial and distal cantilever in the posterior region of the mandible. For each proposed model, axial (400N) and oblique (200N) loads will be applied and distributed across the different elements. The results will be compared using principal stress and von Mises maps, with quantitative data being analyzed considering a significance value of 0.05.Additionally, there will be the development of two systematic reviews that will follow PRISMA and Cochrane Collaboration criteria: A) Analysis of the presence of a cantilever in the survival and success of ISP-C; B) Analysis of the survival and success of CAD/CAM monolithic implant-supported prostheses compared to conventional metal-ceramic prostheses. The results obtained through DIC and 3D-MEF will make it possible to predict mechanical complications of materials and anticipate unfavorable clinical situations. At the same time, systematic reviews will demonstrate the best scientific evidence regarding these materials based on current clinical data. Thus, the proposal will contribute to decision-making by professionals involving oral rehabilitation with implants and enrich the scientific discussion regarding developing promising materials for implant-supported fixed prostheses.