光固化复合树脂固化深度的逐步回归分析

Stepwise regression analysis of cure depths of light curing composite resin

目的:分析不同处理因素对光固化复合树脂固化深度的影响,探讨各因素对固化深度的影响程度。方法:采用多因素不同水平析因实验设计,共制备192例试件。所得试件经Planmeca曲面断层机扫描,并测量其固化深度。所有实验数据采用SPSS11.5软件包进行t检验、多元逐步回归。结果:不同光源、不同投照距离、不同光照时间之间的差异具有统计学意义(P<0.01);多元逐步回归分析表明,3个因素与固化深度存在显著的线性相关关系(P<0.01)。结论:3个因素均可影响光固化复合树脂的固化深度,以光照时间对固化深度的影响最大,且三者之间存在交互作用。

Objective： To analyze the effect of different treating factors on cure depths of light curing composite resin, and discuss the relationship between different treating factors and cure depths. Methods： 192 samples were designed with factorial experiment. The whole samples were scanned by Planmeca ProMax panoramic X-ray unit and cure depths were measured. The data was statistically analyzed by SPSS 11.5 software package for t test and stepwise regression analysis. Results：There were significant differences among different light curing units, irradiation distances and cure time（P 〈0.01 ）. There was a significant linear correlation among three factors and cure depths （ P 〈 0.01 ）. Conclusion ： Cure depths of light curing composite resin may be affected by these three factors and cure time is the most important factor. There is still interactions among three factors.