2种激光对硬化牙本质粘接强度影响的实验研究

›› 2015, Vol. 35 ›› Issue (11): 921-923.

2种激光对硬化牙本质粘接强度影响的实验研究

孙海燕,仇丽鸿

中国医科大学附属口腔医院

收稿日期:2014-10-21 修回日期:2015-05-15 出版日期:2015-11-28 发布日期:2015-11-28
通讯作者: 孙海燕 E-mail:125437771@qq.com
基金资助:
辽宁省自然科学基金项目

Effect of different kinds of lasers on microtensile bond strength of noncarious sclerotic dentin

Received:2014-10-21 Revised:2015-05-15 Online:2015-11-28 Published:2015-11-28

摘要/Abstract

摘要： ［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。

关键词: 激光, 硬化牙本质, 微拉伸粘结强度

Abstract: Abstract: Objective To compare the effect of different kinds of lasers on microtensile bond strength of noncarious 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 LPop,filled with Z350 resin,and preserved in normal saline （37 ℃）for 24 h.Then fatigue test pieces were made and the microtensile bond strength was evaluated.Results were subject to statistical analysis using oneway 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.

Key words: laser, sclerotic dentin, micro-tensile bond strength

中图分类号:

R781.05

孙海燕仇丽鸿. 2种激光对硬化牙本质粘接强度影响的实验研究[J]. , 2015, 35(11): 921-923.

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