摘要
目的:采用微拉伸黏结强度实验,比较脉冲Nd:YAG激光作用于硬化牙本质对复合树脂-硬化牙本质之间自酸蚀黏结强度的影响。方法:选择10颗硬化牙本质视觉分级均为3级以上的面磨损后牙,将磨损面硬化牙本质分为面积近似相等的两部分(约12mm2),随机分为实验组和对照组。实验组以1W、10Hz脉冲Nd:YAG激光作用于硬化牙本质表面,联合自酸蚀黏结剂Adper Prompt L-Pop处理和Z350复合树脂充填;对照组直接使用自酸蚀黏结剂Adper Prompt L-Pop处理硬化牙本质表面,并用Z350复合树脂充填。24h后制作微拉伸试件,测试微拉伸黏结强度,在体视显微镜下观察断裂模式并分类。采用SPSS13.0软件包对试件微拉伸黏结强度值做配对t检验。结果:实验组和对照组的微拉伸黏结强度分别为(18.94±6.81)MPa和(15.76±5.61)MPa。实验组复合树脂与硬化牙本质黏结强度高于对照组,差别有统计学意义(P<0.05)。体视显微镜下观察,断裂多发生在黏结树脂-牙本质界面。结论:脉冲Nd:YAG激光处理硬化牙本质,能够提高复合树脂与硬化牙本质之间的自酸蚀黏结强度。
PURPOSE：To evaluate the microtensile bond strength of pulse Nd：YAG laser to non-carious sclerotic dentin.METHODS：Ten extracted human teeth with dental attrition on occlusal surface were cut into nearly equal halves（about 12mm2）,and randomly divided into two groups with 10 in each group.All teeth were bonded using an all-in-one self-etch dentin adhesive（Adper Prompt L-Pop） to composite resin after the teeth in the experimental group were processed with pulse Nd：YAG laser（1W,10Hz）.After 24 hours,under copious water spray the teeth were sectioned into 0.8mm×0.8mm columns with silicon carbide dish at low speed.The microtensile bond strengths of samples were measured.Each fractured specimen was examined under stero-microscope.Paired t test was used for analysis of the microtensile bond strengths between the two groups with SPSS13.0 software package.RESULTS：The microtensile bond strength in the experimental group and control group was（18.94±6.81）MPa and（15.76±5.61）MPa,respectively,the difference of these two groups was statistically significant（P〈0.05）.The fractured adhesive dentin surface was mainly adhesive failure mode.CONCLUSION：Pulse Nd：YAG laser（1W,10Hz） can improve the strength of composite resin bonding to sclerotic dentin.
出处
《上海口腔医学》
CAS
CSCD
2009年第4期346-349,共4页
Shanghai Journal of Stomatology
