The effects of heating rate and sintering time on the biaxial flexural strength of monolithic zirconia ceramics.

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2023-08-28 DOI:10.1515/bmt-2022-0338

Perihan Oyar, Rukiye Durkan

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引用次数: 1

Abstract

The strength of zirconia ceramic materials used in restorations is dependent upon sintering. Varying sintering protocols may affect the biaxial flexural strength of zirconia materials. This in vitro study was conducted to investigate the effects of sintering parameters on the biaxial flexural strength of monolithic zirconia. Two different monoblock zirconia ceramics were used. Following coloration, samples of both types of ceramics were divided into groups according to whether or not biaxial flexural strength testing was performed directly after sintering or following thermocycling. Biaxial flexural strength data was analysed with a Shapiro Wilk normality test, followed by 1-way ANOVA, Tukey post hoc tests for inter-group comparisons, and paired samples t-tests for intra-group comparisons. A significant difference was found between the biaxial flexural strengths of Zircon X and Upcera ceramics before thermocycling (p<0.05). In both Zircon X and Upcera ceramic groups, the thermocycling process created a significant difference in the biaxial flexural strength values of the ceramic samples in Group 6 (p<0.05) which had the slowest heating rate and longest holding time. The zirconia ceramics have higher BFS at higher heating rates either before or after thermocycling. The holding time has significant effects on thermocycling and flexural strength. The zirconia achieved its optimum strength when it sintered at longer time regardless of heating rates.

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加热速率和烧结时间对单片氧化锆陶瓷双轴抗折强度的影响。

用于修复的氧化锆陶瓷材料的强度取决于烧结。不同的烧结工艺会影响氧化锆材料的双轴抗折强度。本文通过体外实验研究了烧结参数对整体氧化锆双轴抗折强度的影响。使用了两种不同的单块氧化锆陶瓷。着色后，根据是烧结后直接进行双轴抗折强度测试，还是热循环后进行双轴抗折强度测试，将两种陶瓷样品进行分组。双轴抗折强度数据采用Shapiro Wilk正态检验进行分析，随后采用单因素方差分析，组间比较采用Tukey事后检验，组内比较采用配对样本t检验。在热循环前，锆石X和Upcera陶瓷的双轴抗折强度存在显著差异(p

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.