颜色及光照射条件对复合树脂核材料聚合的影响

发布时间：2018-05-01 14:16

本文选题：复合树脂核 + 颜色　；参考：《实用口腔医学杂志》2017年01期

【摘要】：目的:评估材料颜色和光照射条件对流动性双重固化复合树脂核材料聚合的影响。方法:将双重固化流动性复合树脂核材料(牙本质色和白色,Para Core)注满单端开口的长方体不透光硅橡胶模具中,将光固化灯紧贴开口端以1 000 mW/cm~2持续照射20 s或以3 200 mW/cm~2持续照射6 s获得4组试件(n=5)。试件避光保存1 h后,测量试件纵断面距光源1、2、3mm深度的努氏显微硬度。试件继续避光保存24 h后,重复上述测量。采用单因素方差分析对数据进行统计学分析。结果:4组试件随测量深度的增加试件的硬度值显著降低。光照后24 h,牙本质色试件每个测量深度的硬度值在1 000 mW/cm~2×20 s和3 200 mW/cm~2×6 s条件间无显著差异,但白色试件每个测量深度的1 000 mW/cm~2×20 s的硬度值要显著高于3 200 mW/cm~2×6 s的硬度值。结论:不同颜色的复合树脂核材料需要选择合适的光照射条件来获得最佳的聚合效果。
[Abstract]:Aim: to evaluate the effects of color and irradiation conditions on the polymerization of fluidity double curing composite resin core materials. Methods: double solidified fluidity composite resin core materials (dentine color and white Para Core) were filled with cuboid impervious silicone rubber mould with single end opening. Four groups of specimens were obtained by continuous irradiation of 1 000 mW/cm~2 for 20 s or 3 200 mW/cm~2 for 6 s. The Knoop microhardness of the specimen was measured at a depth of 3 mm from the light source for 1 h. The above measurements were repeated after the specimens were kept in the dark for 24 hours. Single factor analysis of variance (ANOVA) was used to analyze the data. Results the hardness of the specimens decreased significantly with the increase of measuring depth. At 24 h after illumination, there was no significant difference in hardness values between 1 000 mW/cm~2 脳 20 s and 3 200 mW/cm~2 脳 6 s, but the hardness value of 1 000 mW/cm~2 脳 20 s per measured depth of white specimen was significantly higher than that of 3 200 mW/cm~2 脳 6 s. Conclusion: different color composite resin core materials need to select appropriate light irradiation conditions to obtain the best polymerization effect.
【作者单位】：南京市口腔医院·南京大学医学院附属口腔医院修复科;
【基金】：国家自然科学基金面上项目(编号:81470781) 江苏省自然科学基金面上项目(编号:BK20141082)
【分类号】：R783.1

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