2种激光对硬化牙本质粘接强度影响的实验研究  

Effect of different kinds of lasers on micro-tensile bond strength of non-carious sclerotic dentin

作　　者：孙海燕[1] 仇丽鸿[1] 

机构地区：[1]中国医科大学口腔医学院牙体牙髓病科,辽宁沈阳110002

出　　处：《口腔医学》2015年第11期918-920,共3页Stomatology

基　　金：中国医科大学口腔医学院青年科研启动基金项目(K101593-12-37)

摘　　要：目的比较2种不同激光对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3级以上牙面磨损的后牙30颗,按照随机数字表法随机分为Er,Cr:YSGG激光处理组(E组)、Nd:YAG激光处理组(N组)和对照组,联合Adper Prompt L-Pop处理、Z350复合树脂充填,置于37℃生理盐水中24 h,制作微拉伸试件并进行微拉伸粘接强度测试。采用SPSS13.0软件对微拉伸粘接强度值进行单因素方差分析。结果 E组粘接强度(24.71±3.13)MPa,N组粘接强度(21.72±2.36)MPa,对照组粘接强度(18.61±2.01)MPa。E组的粘接强度最高,3组之间相比较差异均有统计学意义(P<0.05)。体视显微镜观察结果发现断裂多发生于牙本质-树脂粘接界面。结论 Er,Cr:YSGG激光和Nd:YAG激光均能够提高硬化牙本质与复合树脂的粘接强度,且Er,Cr:YSGG激光处理后获得的粘接强度更高。Objective To compare the effect of different kinds of lasers on micro-tensile bond strength of non-carious sclerotic dentin. Methods Thirty human molars with occlusal wear were randomly divided into group E,group N and the control group. Group E were treated with Er,Cr： YSGG laser,while group N were treated with Nd： YAG laser. Then all three groups were treated with Adper Prompt L-Pop,filled with Z350 resin,and preserved in normal saline（ 37 ℃） for 24 h. Then fatigue test pieces were made and the micro-tensile bond strength was evaluated. Results were subject to statistical analysis using one-way analysis of variance（ ANOVA）. Results The bonding strength was（ 24. 71 ± 3. 13） MPa in group E,（ 21. 72 ± 2. 36） MPa in group N,and（ 18. 61 ± 2. 01） MPa in the control group. The differences among all groups were statistically significant（ P〈0. 05）. The breakage mostly happened in adhesive dentine surface. Conclusions The bonding strength of molars to Z350 resin can be increased by Er,Cr： YSGG laser and Nd： YAG laser,and the former is more effective.

关 键 词：激光 硬化牙本质 微拉伸粘结强度 

分 类 号：R781.05[医药卫生—口腔医学]