Oxygen inhibition in dental resins
Oxygen inhibition in dental resins
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DOI：
10.1177/154405910508400808
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发表时间：
2005-08-01
影响因子：
7.6
通讯作者：
Zhu, XX
中科院分区：
文献类型：
--
作者：
Gauthier, MA;Stangel, I;Zhu, XX
氧抑制自由基聚合并产生具有未固化表面的聚合物。当薄层树脂聚合时，或在消除抑制的常规方法不合适的情况下，这是一个问题。在这项研究中，我们测试的假设，粘度，填料含量，和聚合温度修改在树脂中的氧扩散或自由基物种的反应性，并影响表面附近的转化程度。共焦拉曼显微光谱用于测量从固化树脂的表面到本体的单体转化率。增加的粘度被证明限制氧扩散和增加表面附近的转化率，而不一定修改抑制的深度。填充材料被证明增加，同时，氧扩散率和树脂的粘度，这对转化率有相反的影响。在高于类似于110摄氏度的温度下的聚合显示出消除氧抑制。
Oxygen inhibits free radical polymerization and yields polymers with uncured surfaces. This is a concern when thin layers of resin are being polymerized, or in circumstances where conventional means of eliminating inhibition are inappropriate. In this study, we tested the hypothesis that viscosity, filler content, and polymerization temperature modify oxygen diffusion in the resin or the reactivity of radical species, and affect the degree of conversion near the surface. Confocal Raman micro-spectroscopy was used to measure monomer conversion from the surface to the bulk of cured resins. Increased viscosity was shown to limit oxygen diffusion and increase conversion near the surface, without necessarily modifying the depth of inhibition. The filler material was shown to increase, simultaneously, oxygen diffusivity and the viscosity of the resin, which have opposite effects on conversion. Polymerization at a temperature above similar to 110 degrees C was shown to eliminate oxygen inhibition.