玻璃离子水门汀与光固化复合树脂的蠕变实验

The Experiment of Creep with Glass Ionomer Cement and Light-cured Composite Resin

通过蠕变实验得出了光固化型玻璃离子水门汀试样、银粉玻璃离子水门汀试样、光固化复合树脂试样的蠕变数据、蠕变曲线,建立了各组试样的蠕变函数方程,对比分析三种材料的蠕变特性,为临床提供蠕变力学参数。取光固化型玻璃离子水门汀试样、银粉玻璃离子水门汀试样、光固化复合树脂试样各10个,在电子万能试验机上进行蠕变实验,模拟人体温在36.5±1℃的温度下,以0.1 Mpa/s的应力增加速度对试样施加应力,每个试样采集100个实验数据,以归一化分析的方法处理蠕变数据,拟合蠕变曲线。光固化型玻璃离子水门汀试样7 200 s蠕变量为0.301%,银粉玻璃离子水门汀试样7 200 s蠕变量为0.262%,光固化复合树脂试样7 200 s蠕变量为0.230%,光固化型玻璃离子水门汀试样7 200 s蠕变量大于银粉玻璃离子水门汀试样7 200 s蠕变量,光固化复合树脂试样7 200 s蠕变量差异显著(P<0.05)。各组试样蠕变曲线是以指数关系变化的。光固化型玻璃离子水门汀由于采用了光化处理,改善了其蠕变特性。

To get the creep data and the creep curves by creep test with the light cured glass ionomer cement specimen,the glass ionomer cement specimen and the light cured composite resin sample,we established the creep equation of different sample,and we analyzed the creep characteristics of three kinds of materials,which provide a clinical creep parameters were analyed.10 glass ionomer cement specimen of the light cared,10 glass ionomer cement specimen,and the 10 specimen of light cured composite resin sample were taken,and we conducted creep experiments in electronic universal testing machine.We simulated human body temperature at a tem-perature of 36.5 ±0.5 ℃ and applied to the specimen stress with stress increasing speed of 0.1Mpa/s,then 100 experimental data in each of samples were collected,then the normalized analysis method was used for processing creep data,and crept curve fitting.The creep of the light cured glass ionomer cement specimen at 7 200 s was 0.301%,the creep of the glass ionomer cement specimen at 7 200 s was 0.262%,and the creep of the glass ionomer cement specimen at 7 200 s was 0.230%,The creep of the light cured glass ionomer cement specimen at 7 200 s was more than that of the glass ionomer cement specimen and the light cured composite resin sam-ple.The differences between the three materials were significant（P〈0.05）.The creep curve of each specimen is the relationship be-tween changes in index.Light cured glass ionomer cement can improve the creep properties because of the photochemical treatment .