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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Minimal tooth preparation for posterior monolithic ceramic crowns: Effect on the mechanical behavior, reliability and translucency

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Author(s):
Piva, Amanda Maria de Oliveira Dal [1] ; Tribst, Joao Paulo Mendes [1] ; Jalkh, Ernesto Byron Benalcazar [2] ; Anami, Lilian Costa [1] ; Bonfante, Estevam Augusto [2] ; Bottino, Marco Antonio [1]
Total Authors: 6
Affiliation:
[1] Sao Paulo State Univ Unesp, Inst Sci & Technol, PhD Grad Program Restorat Dent, Ave Engn Francisco Jose Longo 777, BR-12245000 Sao Jose Dos Campos, SP - Brazil
[2] Univ Sao Paulo, Bauru Sch Dentistry, Dept Prosthodont & Periodontol, Alameda Dr Octavio Pinheiro Brisolla 9-75, BR-17012901 Bauru, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Dental Materials; v. 37, n. 3, p. E140-E150, MAR 2021.
Web of Science Citations: 1
Abstract

Objective. Despite the increased use of monolithic crowns, their performance has yet to be determined when the minimal tooth preparation (MTP) principle is considered. The goal of this study was to evaluate the effect of MTP on the mechanical behavior, reliability and translucency of posterior monolithic ceramic crowns. Methods. Dentin analogues were machined using two preparation designs (0.5 or 1 mm reduction) to receive first molar crowns in order to evaluate the monolithic crown performance. Next, 126 crowns were divided (21/g) according to the material (High translucent zirconia - YZHT, Zirconia reinforced lithium silicate - ZLS and Hybrid ceramic - HC) and thickness (0.5 or 1 mm). Tensile stress concentration was calculated using the finite element method. The crowns were adhesivelly cemented and step stress fatigued to calculate reliability for missions at 600 and 1000 N. Translucency was analyzed in 10 discs of each material and thickness. Results. Higher stress concentration was found in thinner crowns and those with higher elastic modulus. YZHT crowns were suspended when fatigue reached 1500 N load, thus 1-parameter Weibull was used to analyze the data. Reliability was only affected by thickness at 1000 N. ZLS.5 showed lower survival than HC.5, which was similar to the groups that presented 100% survival. YZHT showed the highest strength and data scattering. ZLS1 (22.3 +/- 1.4) presented higher translucency than HC1 (19.2 +/- 0.6) and YZHT1 (12.0 +/- 2.9), whereas ZLS.5 and HC.5 were similar to each other (26.5 +/- 2.3, 26.7 +/- 2.2) and superior to YZHT.5 (12.7 +/- 1.2). Significance. HC.5 combined high reliability and translucency with low stress concentration, yielding better crown performance and tooth preservation. (C) 2020 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved. (AU)

FAPESP's process: 12/19078-7 - Development and processing of Al2O3-ZrO2 translucent composite for CAD/CAM monolithic prostheses: the effect of aging on biaxial flexural strength
Grantee:Estevam Augusto Bonfante
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 17/23059-1 - Behavior of different rehabilitations with ceramic materials under mechanical fatigue
Grantee:Marco Antonio Bottino
Support Opportunities: Regular Research Grants
FAPESP's process: 18/03984-5 - The effect of wear on the shade characterization of different monolithic ceramics
Grantee:Amanda Maria de Oliveira Dal Piva
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 18/03072-6 - Experimental 70% Al2O3-30% ZrO2 composites: structural characterization and survival probability before and after aging
Grantee:Ernesto Byron Benalcazar Jalkh
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 17/09104-4 - Biomechanical behavior and survival of implant-supported hybrid ceramic crowns manufactured by different techniques
Grantee:João Paulo Mendes Tribst
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 17/11535-3 - Influence of ceramic thickness on biomechanical behavior, survival and translucency of monolithic crowns
Grantee:Amanda Maria de Oliveira Dal Piva
Support Opportunities: Scholarships in Brazil - Doctorate