摘要
目的 :观察固化后二期处理对3种光固化复合树脂单体转化率的影响。方法:3种光固化复合树脂CHARISMA誖A2型、DenFilTM Flow、自制纳米羟基磷灰石复合树脂光照40 s固化后,分别给予光照5 min(B组)、140℃热处理7.5 min(C组)、132℃0.2 MPa热压处理6.5 min(D组)3种二期处理,不做任何二期处理组为对照组(A组)。利用傅立叶变换红外光谱仪,采用标准基线技术测得单体转化率,采用SPSS13.0软件包对数据进行统计学分析。结果:经二期处理的光固化复合树脂,单体转化率均有一定程度提高,140℃热处理组效果最佳,与对照组相比,差异显著(P<0.05);B、D处理组中,除DenFilTM Flow和CHARISMA誖B组与对照组相比差异无显著性外,其余与对照组相比均有显著差异(P<0.05);3种实验组中,DenFilTM Flow各组间、CHARISMA誖光照与热压组间、n-HA复合树脂光照与140℃组间相比,差异无显著性(P>0.05),其余两两相比,均差异显著(P<0.05)。结论:二期处理能提高复合树脂的单体转化率,其中,140℃热处理7.5 min效果显著,对改善复合树脂的综合性能具有一定作用。
PURPOSE： To study the influence of post-cure treatment on the monomer conversion of 3 light-cured composite resins. METHODS： Three kinds of light-cured composite resin： CHARISMA, DenFilTM Flow and nanohydroxyapatite composite resin were double-side cured for 40 s. The materials without any secondary treatment were used as control group （group A）. Group B were lighted in Translux CU light cure case for 5 rain. Group C were subjected to post-cure heat treatment for 7.5 rain at 140℃ and Group D were post heated in 132℃ and pressured 0.2 MPa for 6.5 min. Degree of conversion （DC） of all the samples was measured by Fourier transform infrared spectroscopy （FTIR）. The data was analyzed using SPSS 13.0 software package. RESULTS： The monomer conversion of light-cured composite resins improved at different degree after post-cure treatment, and group C was the most favorable group （P〈0.05）. Compared with the control group, group B and C had significant differences （P〈0.05） except when the DenFilTM Flow and CHARISMA were lighted for 5 minutes （P〉0.05）. Among the experimental groups, there was no significant difference between each group of DenFilTM Flow groups, CHARISMA illumination and hot-pressing groups, and n-HA composite resin illumination compared with 140~C groups. CONCLUSIONS： Post-cure treatment can increase the monomer conversion of light-cured composite resin so as to improve material performance, particularly for the heat treatment for 7.5 min at 140℃.
出处
《上海口腔医学》
CAS
CSCD
北大核心
2014年第3期290-293,共4页
Shanghai Journal of Stomatology
基金
山东省自然科学基金(ZR2013HM044)
山东省医药卫生科技发展计划项目(2013WS0308)~~
关键词
光固化复合树脂
单体转化率
二期处理
Light-cured composite resin
Monomer conversion
Secondary treatment
