两种牙体充填材料对乳牙边缘微渗漏及固化效率的体外研究  

Evaluation of Microleakage and Polymerization Efficiency in Primary Teeth with Two Different Restorative Material

作　　者：冯芃 金星爱[1] 吕晶[1] 裴丽玲 孟祥玲 刘英群[1] FENG Peng;JIN Xing-ai;LV Jing;PEI Li-ling;MENG Xiang-ling;LIU Ying-qun(Department of The Srst hospital affiliated with Harbin medical university,Children's dental Harbin,Heilongjiang,150000y China;Heilongjiang Stomatological Disease Center,Harbin,Heilongjiang,150000,China)

机构地区：[1]哈尔滨医科大学附属第一医院儿童口腔科,黑龙江哈尔滨150000 [2]黑龙江省口腔病防治院,黑龙江哈尔滨150000

出　　处：《现代生物医学进展》2019年第5期872-875,共4页Progress in Modern Biomedicine

基　　金：黑龙江省自然科学基金项目(H2016037)

摘　　要：目的:比较纳米瓷充填材料和复合树脂充填乳牙V类洞边缘微渗漏的影响以及固化效率的差异。方法:第一部分为微渗漏实验,选取滞留拔除的上颌乳前牙20颗,唇侧制备V类洞,随机分为A、B两组,分别用Composan LCM和Filtek^(TM) Z350充填,亚甲基蓝染色处理,24 h后使用体式显微镜观察,测量染料渗入深度为微渗漏值,每组各选2个样本扫描电镜观察充填体与牙体组织间粘结情况。第二部分为显微硬度实验,分别用两种充填材料制作模块各9个,记为A、B两组,材料模块光固化24 h后使用显微硬度仪检测充填材料的固化效率。结果:Composan LCM组微渗漏值明显低于Filtek^(TM)Z350组(P<0.05);扫描电镜下观察Filtek^(TM) Z350组充填材料与牙体组织间可见裂缝,界面参差不齐,有不连续的小断裂,Composan LCM组界面连续均匀,未见明显裂缝;两组充填材料的固化效率无显著差异(P>0.05)。结论:纳米瓷充填材料和复合树脂均可用于乳牙龋洞充填,使用纳米瓷充填材料可减少微渗漏。Objective:To evaluate the efficiency of Composan LCM and FiltekTM Z350 on the micro-leakage of Class V cavities.Methods:Part 1:20 samples of retained maxillary primary incisors were collected,Class V cavities on the buccal surfaces were prepared and randomly divided into two groups.Group A and group B were filled with Composan LCM and FiltekTM Z350 respectively.All samples were stained for 24 hours after filling and observed by stereomicroscope and scanning electron microscopy.Part 2:Group A to B were filled with Composan LCM and FiltekTM Z350 respectively and light-cured.After 24 hours of light-cured,all the specimens were used the micro-hardness method to detect the curing efficiency.Results:The micro-leakage of group B was significantly higher than that of group A(P<0.05).SEM showed that there are visible cracks between the filling materials of group B and the dental tissue,and the interface is uneven with discontinuous small fractures.The interface of group A was continuous and uniform without obvious cracks,there was no significant difference in curing efficiency with different filling materials(P>0.05).Conclusion:Composan LCM and FiltekTM Z350 were suitable for primary carious cavities,and using Composan LCM had less micro-leakage than FiltekTM Z350.

关 键 词：纳米瓷有机充填材料 乳牙 微渗漏 固化效率 

分 类 号：R783.1[医药卫生—口腔医学]