Three methods to measure the photopolymerization kinetics for different radiant emittance and composite type.

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.2023-197

Chang-Ha Lee, In-Bog Lee

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Abstract

Photopolymerization kinetics affects the curing time, degree of conversion, polymerization shrinkage, and mechanical properties of composites. The aim of this study was to compare three methods (temperature, heat flow, and polymerization shrinkage) for photopolymerization kinetics measurement of composites. The photopolymerization kinetics of four composites (2 packable and 2 flowable) were measured with an LED light for 20 s (radiant emittance: 2,100 mW/cm²). For the two packable composites, photopolymerization kinetics was measured with varying the radiant emittance and exposure time. For each measurement method, peak times were determined as the time when maximum temperature rise, heat flow, and shrinkage rate occurred, respectively. The photopolymerization kinetics differed among the measurement methods. The photopolymerization kinetics of composites changed as the radiant emittance and composite type varied. In clinical practice and research on the composite restoration, the kinetics should be considered comprehensively with the complementary use of various measurement methods.

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针对不同的辐射发射率和复合材料类型，采用三种方法测量光聚合动力学。

光聚合动力学会影响复合材料的固化时间、转化率、聚合收缩率和机械性能。本研究旨在比较复合材料光聚合动力学测量的三种方法（温度、热流和聚合收缩）。使用 LED 灯（辐射发射率：2,100 mW/cm2）测量了四种复合材料（两种可包装，两种可流动）20 秒的光聚合动力学。对于两种可包装的复合材料，光聚合动力学是通过改变辐射发射率和曝光时间来测量的。对于每种测量方法，峰值时间分别确定为出现最大温升、热流和收缩率的时间。不同测量方法的光聚合动力学各不相同。复合材料的光聚合动力学随辐射发射率和复合材料类型的变化而变化。在复合材料修复的临床实践和研究中，应综合考虑动力学问题，并辅以各种测量方法。

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.