Comparative evaluation of secondary heat treatment and a high intensity light source for the improvement of properties of prosthetic composites.
Comparative evaluation of secondary heat treatment and a high intensity light source for the improvement of properties of prosthetic composites.
复制标题
二次热处理和高强度光源对改善假体复合材料性能的比较评估。
DOI：
--
复制
发表时间：
2000
影响因子：
2.9
通讯作者：
M. Atsuta
中科院分区：
文献类型：
--
作者：
N. Tanoue;H. Matsumura;M. Atsuta
本研究确定了硬度和水溶性的两个假体复合材料聚合与三种固化模式的目的，评估二次加热和高强度光源对所得材料性能的影响。两种假体复合材料（Artglass和Dentacolor）用以下方法固化：（1）通过具有氙频闪光源的光固化单元曝光（2）用氙单元曝光120秒，然后在烘箱（KL 100）中在100 ° C下加热15分钟;和（3）通过具有两个金属卤化物灯（Hyper LII）的光固化单元曝光120秒。根据标准化测试方法测定努普硬度和水溶性。虽然后固化热处理大大提高了这两种材料的努普硬度值，最大的硬度值产生与使用的金属卤化物单元。当材料用金属卤化物单元固化时，Dentacolor材料的水溶性最低，其次是二次加热组，而Artglass材料的溶解度不受固化模式的影响。这表明使用高强度光源比应用二次加热更有效地改善复合材料的后固化性能。
This study determined the hardness and water solubility of two prosthetic composites polymerized with three curing modes for the purpose of evaluating the influence of secondary heating and a high intensity light source on resulting material properties. Two prosthetic composite materials (Artglass and Dentacolor) were cured with the following methods: (1) exposure by means of a photo-curing unit with a xenon stroboscopic light source (Dentacolor XS) for 120 s; (2) exposure with the xenon unit for 120 s, followed by heating in an oven (KL 100) at 100 degrees C for 15 min; and (3) exposure by means of a photo-curing unit with two metal halide lamps (Hyper LII) for 120 s. Knoop hardness and water solubility were determined according to standardized testing methods. Although post-cure heat treatment considerably elevated the Knoop hardness number for both materials, the greatest hardness number was generated with the use of the metal halide unit. Water solubility of the Dentacolor material was lowest when the material was cured with the metal halide unit, followed by the secondary heated group, whereas, solubility of the Artglass material was unaffected by the curing modes. This suggests that the use of a high intensity light source is more effective than the application of secondary heating for improving the post-curing properties of composites.