Effect of low-temperature degradation and sintering protocols on the color of monolithic zirconia crowns with different yttria contents.

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-03-29 Epub Date: 2024-01-31 DOI:10.4012/dmj.2023-194

Shoko Miura, Akikazu Shinya, Hiroyasu Koizumi, Pekka Vallittu, Lippo Lassila, Masanori Fujisawa

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引用次数: 0

Abstract

This study investigated the effects of low-temperature degradation (LTD) on the L*, a*, and b* values of highly translucent zirconia crowns. Four types of zirconia disks with different yttria contents (IPS e.max ZirCAD LT, IPS e.max ZirCAD MT, IPS e.max ZirCAD MT Multi, IPS e.max ZirCAD Prime, Ivoclar) and two shades (A2 and BL) were used. A crown was manufactured using four types of zirconia and LTD treated. Color measurements were performed, and the color difference (ΔE₀₀) before and after LTD was calculated. The microstructure was determined through X-ray fluorescence and X-ray diffractometry. Highly translucent zirconia crowns showed greater changes in the a* and b* values than in the L* value after LTD, regardless of the shade. The Multi2 crowns exhibited a discernible color change due to the LTD treatment. The X-ray fluorescence results did not reveal any apparent change in the microstructure between sintering programs for all zirconia specimens.

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低温降解和烧结方案对不同钇含量的整体氧化锆冠颜色的影响。

本研究调查了低温降解（LTD）对高透光氧化锆冠的 L*、a* 和 b* 值的影响。研究使用了四种不同钇含量的氧化锆盘（IPS e.max ZirCAD LT、IPS e.max ZirCAD MT、IPS e.max ZirCAD MT Multi、IPS e.max ZirCAD Prime，Ivoclar）和两种色调（A2 和 BL）。使用四种氧化锆制造牙冠，并经 LTD 处理。进行了颜色测量，并计算了LTD前后的色差（ΔE00）。通过 X 射线荧光和 X 射线衍射测定法确定了微观结构。高透光性氧化锆牙冠在LTD后的a*和b*值的变化大于L*值的变化，而与色调无关。Multi2牙冠在LTD处理后出现了明显的颜色变化。X 射线荧光结果显示，所有氧化锆试样在不同烧结程序之间的微观结构都没有明显变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.