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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Survival of implant-supported resin-matrix ceramic crowns: In silico and fatigue analyses

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Autor(es):
Bergamo, Edmara T. P. [1] ; Yamaguchi, Satoshi [2] ; Coelho, Paulo G. [3] ; Lopes, Adolfo C. O. [1] ; Lee, Chunwoo [2] ; Bonfante, Gerson [1] ; Jalkh, Ernesto B. Benalcazar [1] ; Araujo-Junior, Everardo N. S. de [1] ; Bonfante, Estevam A. [1]
Número total de Autores: 9
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Bauru Sch Dent, Dept Prosthodont & Periodontol, 9-75 Otavio Pinheiro Brisola, BR-17012901 Bauru, SP - Brazil
[2] Osaka Univ, Grad Sch Dent, Dept Biomat Sci, 1-8 Yamadaoka, Suita, Osaka 5650871 - Japan
[3] NYU, Hansjorg Wyss Dept Plast Surg Mech & Aerosp Engn, Dept Biomat & Biomimet, 345 24th St, New York, NY 10010 - USA
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Dental Materials; v. 37, n. 3, p. 523-533, MAR 2021.
Citações Web of Science: 0
Resumo

Objective. To evaluate the fatigue survival, failure mode, and maximum principal stress (MP Stress) and strain (MP Strain) of resin-matrix ceramic systems used for implant-supported crowns. Methods. Identical molar crowns were milled using four resin-matrix ceramics (n = 21/material): (i) Shofu Hard, (ii) Cerasmart (iii) Enamic, and (iv) Shofu HC. Crowns were cemented on the abutments, and the assembly underwent step-stress accelerated-life testing. Use level probability Weibull curves at 300 N were plotted and the reliability at 300, 500 and 800 N was calculated for a mission of 50,000 cycles. Fractographic analysis was performed using stereomicroscope and scanning electron microscope. MP Stress and MP Strain were determined by finite element analysis. Results. While fatigue dictated failures for Cerasmart (beta > 1), material strength controlled Shofu Hard, Enamic, and Shofu HC failures (beta < 1). Shofu HC presented lower reliability at 300 N (79%) and 500 N (59%) than other systems (>90%), statistically different at 500 N. Enamic (57%) exhibited a significant reduction in the probability of survival at 800 N, significantly lower than Shofu Hard and Cerasmart; however, higher than Shofu HC (12%). Shofu Hard and Cerasmart (>93%) demonstrated no significant difference for any calculated mission (300-800 N). Failure mode predominantly involved resin-matrix ceramic fracture originated from occlusal cracks, corroborating with the MP Stress and Strain location, propagating through the proximal and cervical margins. Significance. All resin-matrix ceramics crowns demonstrated high probability of survival in a physiological molar load, whereas Shofu Hard and Cerasmart outperformed Enamic and Shofu HC at higher loads. Material fracture comprised the main failure mode. (C) 2021 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved. (AU)

Processo FAPESP: 16/17793-1 - Desenvolvimento e caracterização mecânica e óptica de compósito 80% Al2O3 e 20% ZrO2 translúcida para próteses monolíticas CAD/CAM
Beneficiário:Adolfo Coelho de Oliveira Lopes
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 12/19078-7 - Desenvolvimento e processamento de compósito de Al2O3-ZrO2 para próteses monolíticas CAD/CAM: efeito do envelhecimento na resistência à flexão biaxial
Beneficiário:Estevam Augusto Bonfante
Linha de fomento: Auxílio à Pesquisa - Jovens Pesquisadores
Processo FAPESP: 16/18818-8 - EMU concedido no processo 2012/19078-7: ElectroPuls E3000 Linear-Torsion All-Electric dynamic test instrument package
Beneficiário:Estevam Augusto Bonfante
Linha de fomento: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
Processo FAPESP: 19/08693-1 - Compósitos experimentais à base de alumina e zircônia infiltrados por vidro: caracterização microestrutural e das propriedades ópticas e mecânicas.
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Linha de fomento: Bolsas no Brasil - Pós-Doutorado