摘要
目的通过微拉伸粘接强度实验，探讨激光对全酸蚀粘接剂处理后的非龋性硬化牙本质与复合树脂粘接强度的影响。方法选择牙本质视觉分级为3级以上的殆面磨损后牙10颗，每颗牙以低速锯垂直于牙本质表面，将硬化牙本质分为面积相等的两部分（约12mm^2），按随机数字表法将这两部分分为实验组和对照组，实验组经Nd：YAG激光（1W，10Hz）处理后，使用Scotchbond（STB）酸蚀、涂布粘接剂Adper Singlebond2（ASB）联合Z350复合树脂充填，对照组使用STB酸蚀、涂布粘接剂ASB联合Z350复合树脂充填。置于37℃生理盐水中24h后，制作微拉伸试件并测试微拉伸粘接强度，体视显微镜下观察断裂模式并分类。采用SPSS13．0软件对微拉伸粘接强度值做t检验。结果实验组粘接强度[（26．11±1．62）MPa]显著高于对照组[（22．27±2．16）MPa]，差异有统计学意义（P=0．006）。体视显微镜下可见断裂多发生于牙本质-树脂粘接面。结论Nd：YAG激光能够提高硬化牙本质与全酸蚀粘接系统的粘接强度。
Objective To investigate the effect of Nd： YAG laser on microtensile bond strength of single bond adhesive system for non-carious sclerotic dentin. Methods Ten human molars with occlusal wearing were cut into equal halves （nearly 12 minE）, and randomly divided into experimental group and control group. The teeth in experimental group were processed with Nd： YAG laser（ 1 W, 10Hz）, and then applied with Scotchbond and filled with Z350 resin. In control group, the teeth were processed with single bond and filled with Z350 resin. The specimens were sectioned, and the mierotensile bond strengths of each sample was tested by a universal testing machine. Results The bond strength of the experimental group [ （26. 11± 1.62） MPa] was significantly higher than that of the control group[ （22. 27 ± 2. 16） MPa], P 〈0. 05. Stero-microscope examination indicated that most of the fractures occurred in dentin-resin interface. Conclusions Nd： YAG laser can increase the mierotensile bond strength of single bond adhesive system in non-carious sclerotic dentin.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2010年第11期684-686,共3页
Chinese Journal of Stomatology
关键词
激光
牙本质
牙黏合
Lasers
Dentin
Dental bonding
