Influence of the foundation substrate on the fatigue behavior of bonded glass, zirconia polycrystals, and polymer infiltrated ceramic simplified CAD-CAM restorations

This study evaluated the influence of distinct substrates on the mechanical fatigue behavior of adhesively cemented simplified restorations made of glass, polycrystalline or polymer infiltrated-ceramics. CAD/CAM ceramic blocks (feldspathic – FEL; lithium disilicate – LD; yttria-stabilized zirconia –...

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Bibliographic Details
Published in:Journal of the mechanical behavior of biomedical materials 2021-05, Vol.117, p.104391-104391, Article 104391
Main Authors: Machry, Renan Vaz, Borges, Alexandre Luiz Souto, Pereira, Gabriel Kalil Rocha, Kleverlaan, Cornelis Johannes, Venturini, Andressa Borin, Valandro, Luiz Felipe
Format: Article
Language:English
Subjects:
Adhesion
Ceramics
Computer-Aided Design
Cyclic loading
Dental ceramics
Dental Porcelain
Dental Restoration Failure
Dental Stress Analysis
Elastic modulus
Fatigue failure
Materials Testing
Monolithic restorations
Polymers
Surface Properties
Zirconium
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Summary:This study evaluated the influence of distinct substrates on the mechanical fatigue behavior of adhesively cemented simplified restorations made of glass, polycrystalline or polymer infiltrated-ceramics. CAD/CAM ceramic blocks (feldspathic – FEL; lithium disilicate – LD; yttria-stabilized zirconia – YZ; and polymer-infiltrated ceramic network – PICN) were shaped into discs (n = 15, Ø = 10 mm; thickness = 1.0 mm), mimicking a simplified monolithic restoration. After, they were adhesively cemented onto different foundation substrates (epoxy resin – ER; or Ni–Cr metal alloy – MA) of the same shape (Ø = 10 mm; thickness = 2.0 mm). The assemblies were subjected to fatigue testing using a step-stress approach (200N-2800 N; step-size of 200 N; 10,000 cycles per step; 20 Hz) upon the occurrence of a radial crack or fracture. The data was submitted to two-way ANOVA (α = 0.05) to analyze differences considering ‘ceramic material’ and ‘type of substrate’ as factors. In addition, a survival analysis (Kaplan Meier with Mantel-Cox log-rank post-hoc tests; α = 0.05) was conducted to obtain the survival probability during the steps in the fatigue test. Fractographic and finite element (FEA) analyzes were also conducted. The factors ‘ceramic material’, ‘type of substrate’ and the interaction between both were verified to be statistically significant (p 
ISSN:1751-6161
1878-0180
DOI:10.1016/j.jmbbm.2021.104391