Abstract:

Objective    To evaluate the effect of various light-cured filling materials on marginal microleakage. Methods    The cuboid class Ⅰ cavities were cut in 60 freshly extracted human premolars for orthodontic purpose in the Hospital of Stomatology affiliated to China Medical University from June to December of 2015，and they were randomly divided into 3 groups，filled with Z350 （group A），Z350 preheat （group B） and SonicFill resin （group C）. After placement of the restorations，each specimen was sectioned buccolingually and then the microleakage at the margin was evaluated under a stereomicroscope. Results    There was microleakage in all 3 groups. The microleakage of  group C was significantly slighter than the other two groups（P < 0.05），but there was no significant difference between group A and B（P > 0.05）. Conclusion    Marginal microleakage occurs in each of the 3 groups. SonicFill is the dental filling material with lesser marginal microleakage.

Key words: microleakage, composite resin, light-cured

摘要：

目的    评价不同光固化充填材料对窝洞充填修复边缘微渗漏的影响。方法    收集2015年6—12月于中国医科大学附属口腔医院就诊患者因正畸需要而拔除的健康前磨牙60颗，在牙体牙合面制备Ⅰ类洞型后将离体牙随机均分成3组，分别充填Z350树脂（A组）、预热后Z350树脂（B组）和SonicFill声波树脂（C组）。采用染料渗入法进行修复边缘微渗漏试验，在体视显微镜下检测洞壁的微渗漏情况。结果    各组样本均可见微渗漏，C组微渗漏程度明显小于A、B组，差异均有统计学意义（均P < 0.05）；而B组与A组的微渗漏程度差异无统计学意义（P > 0.05）。结论    3种光固化充填材料修复边缘都可能发生微渗漏，SonicFill声波树脂较Z350树脂充填可明显减少微渗漏的发生。

关键词: 微渗漏, 复合树脂, 光固化