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Material and thickness influence on reliability and internal and marginal adaptation of onlays produced by CAD/CAM technology

Grant number: 18/21317-6
Support type:Scholarships in Brazil - Master
Effective date (Start): March 01, 2019
Effective date (End): March 31, 2020
Field of knowledge:Health Sciences - Dentistry - Dental Clinics
Principal researcher:Altair Antoninha Del Bel Cury
Grantee:Mirelle Maria Ruggiero
Home Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil


Hybrid restorative materials such as nanoceramic resins and polymer infiltrated ceramics have been proposed in order to overcome the limitations associated to dental ceramics. The aim of this study is to evaluate the internal and marginal misfit of partial restorations (onlays) with different thicknesses fabricated using hybrid materials and its mechanical behavior through evaluating the stress distribution, reliability and failure mode. One hundred and twenty-six nanoceramic resin or polymer infiltrated ceramic restorations of 0.5, 1.0 or 1.5 mm thickness will be cemented on epoxy resin (G10) preparation replicas. The internal and marginal misfit will be evaluated by ¼CT. The appropriated statistical analyses will be performed. The finite element analysis (FEA) will be performed to evaluate the stress distribution in the onlays and compared with the in vitro test results. Reliability will be evaluated by step-stress accelerated life testing (SSALT). Weibull curves will be calculated and plotted. Fractured specimens will be analyzed by scanning electron microscope (SEM). (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
RUGGIERO, MIRELLE MARIA; GOMES, RAFAEL SOARES; BERGAMO, EDMARA TATIELY PEDROSO; FREITAS, MARIANA ITABORAI MOREIRA; BONFANTE, ESTEVAM AUGUSTO; CURY, ALTAIR ANTONINHA DEL BEL. Resin-matrix ceramics for occlusal veneers: Effect of thickness on reliability and stress distribution. Dental Materials, v. 37, n. 3, p. E131-E139, MAR 2021. Web of Science Citations: 0.

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