Development of a new photoinitiation system for dental light-cure composite resins
Development of a new photoinitiation system for dental light-cure composite resins
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DOI：
10.1016/s0109-5641(99)00021-4
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发表时间：
1999-03-01
期刊：
影响因子：
5
通讯作者：
Rawls, HR
中科院分区：
文献类型：
--
作者：
Park, YJ;Chae, KH;Rawls, HR
目的：为了探索蒽醌（CQ）和1-苯基-1，2-丙二酮（PPD）作为一种新型光引发剂的协同效应，将BisGMA、UDMA、TEGDMA单体混合物与CQ和/或PPD加0.2wt.% N，N-氰乙基-甲基苯胺（CEMA）。共检测了17组，每组3份标本，其中PPD和CQ浓度不同。采用FTIR分光光度法研究了光敏剂种类（CQ或PPD）和比例（PPD/CQ）对转化率（DC）的影响。结果采用方差分析和Student-Newman-Keuls多重范围比较进行分析。用紫外-可见分光光度法测定了PPD和CQ的吸收光谱。一个盲的颜色比较的标本含有两种光敏剂的组合也carried.Results：单独，PPD诱导的DC这是没有显着不同的CQ单独。在组合中，CQ + PPD产生的DC通常超过单独使用相同浓度的任一种产生的DC。最大DC出现在PPD/CQ = 1：1和1：1之间。在总光敏剂浓度高于1.8重量%时。PPD可使DC升高，CQ可使DC降低，这表明二者的作用机制不同。PPD（λ（max）约为410 nm）和CQ（λ（max）约为468 nm）具有不同的波长吸收范围，导致PPD的黄色明显更浅。重要性：1-苯基-1，2-丙二酮是一种光敏剂，在减少与可见光固化牙科树脂相关的颜色问题方面具有潜在价值。与邻苯二酚结合，它协同作用产生a。更有效的光引发反应。(C)1999年牙科材料学院。由爱思唯尔科技有限公司出版。保留所有权利。
Objectives: The purpose of this study is to explore the synergistic effect of combining camphorquinone (CQ) with 1-phenyl-1,2-propanedione (PPD) as a new photoinitiator.Methods: A BisGMA, UDMA, TEGDMA monomer mixture was made light-curing with CQ and/or PPD plus 0.2 wt.% N,N-cyanoethyl-methylaniline (CEMA). Seventeen groups, three specimens each, were tested in which the concentrations of PPD and CQ were varied. The effect of photosensitizer type (CQ or PPD) and ratio (PPD/CQ) on degree of conversion (DC) was investigated using FTIR spectrophotometry. The results were analyzed by ANOVA and Student-Newman-Keuls' multiple range comparison. The absorption spectra of PPD and CQ were recorded by UV-Vis spectrophotometry. A blind color comparison of specimens containing combinations of the two photosensitizers was also undertaken.Results: Alone, PPD induces a DC which is not significantly different from that of CQ alone. In combination, CQ + PPD produces a DC that generally exceeds that produced by the same concentration of either used alone. The maximum DC occurs between PPD/CQ = 1:1 and 1: 1. At total photosensitizer concentrations above 1.8 wr.%. DC is increased by PPD but depressed by CQ, which is evidence that different mechanisms are involved. PPD (lambda(max) approximate to 410 nm) and CQ (lambda(max) approximate to 468 nm) have different wavelength absorption ranges, resulting in a perceptibly lighter shade of yellow for PPD.Significance: 1-phenyl-1,2-propanedione is a photosensitizer of potential value in reducing color problems associated with visible light cured dental resins. In combination with camphorquinone, it acts synergistically to produce a. more efficient photoinitiation reaction. (C) 1999 Academy of Dental Materials. Published by Elsevier Science Ltd. All rights reserved.