铒激光备洞对牙体与充填体间纳米渗漏和粘结强度的影响

›› 2020, Vol. 40 ›› Issue (1): 35-38.

铒激光备洞对牙体与充填体间纳米渗漏和粘结强度的影响

宋召龙¹,李艳萍²,李思宁³,张琳⁴

1. 哈尔滨医科大学附属第一医院
2. 哈医大口腔医学院
3. 哈尔滨工业大学
4. 哈尔滨医科大学附属第一医院口腔牙体牙髓科

收稿日期:2018-12-06 修回日期:2019-02-21 出版日期:2020-01-28 发布日期:2020-01-16
通讯作者: 张琳 E-mail:cczhlin@163.com

The effects of Er:YAG laser cavities preparation on nanoleakage and bond strength between the dentin and the obturator

Received:2018-12-06 Revised:2019-02-21 Online:2020-01-28 Published:2020-01-16
Contact: zhang lin E-mail:cczhlin@163.com

摘要/Abstract

摘要： 目的　评价铒（Er:YAG）激光和高速涡轮手机备洞对牙体与充填体间纳米渗漏和粘结强度的影响。方法　选32颗离体拔出的前磨牙平均分成两组，对照组用高速涡轮手机备洞;实验组用Er:YAG激光备洞，随后进行光固化复合树脂充填。两组各取8颗，进行纳米渗漏测试,扫描电镜(Scanning electron micrographic，SEM)观察渗漏情况。其余样本，检测微拉伸强度。使用SPSS20.0统计软件对各组微拉伸强度进行独立样本t检验。结果　在牙体与充填体间，实验组几乎没有纳米渗漏产生，对照组则产生纳米渗漏带。微拉伸强度：对照组（16.10±4.91）Mpa，实验组（26.53±3.61）Mpa，实验组微拉伸强度大于对照组，两组间差别有统计学意义（P＜0.05）。结论　与涡轮手机相比，Er:YAG激光备洞的纳米渗漏程度更低，粘结强度更好。

关键词: 铒激光, 窝洞制备, 纳米渗漏, 微拉伸强度

Abstract: Objective　The purpose of this study is to compare the effects of cavity preparation between Er:YAG laser and conventional burs on extracted human teeth. Methods　A total of 32 extracted human premolars were used for this experiment.The teeth were randomly divided into 2 groups for cavity preparation,filling and curing:The control group—Cavity preparation with high speed handpiece;the experimental group—Er:YAG laser.All the samples were fillded with the resin.8 samples were randomly selected from the control group and the experimental group.Nano-leakage was observed under scanning electronmicroscopy and statistically analyzed.Independent samples analyze the micro-tensile strength. Results　Scanning electron microscopy showed that there was almost no nano-leakage between the dentin and the filling in the experimental group, and a nano-leakage band was formed between the dentin and the filling in the control group.The bond strength( MPa)of experimental and control group was 26.53±3.61 and 16.10±4.91 respectively. Conclusions　Nano-leakage occurred in all adhesives but it appeared was more serious in the control group.The Er:YAG laser group had higher micro-tensile strength.

Key words: Er:YAG laser, Cavity preparation, Nano-leakage, Micro-tensile strength

中图分类号:

R781.05

宋召龙李艳萍李思宁张琳. 铒激光备洞对牙体与充填体间纳米渗漏和粘结强度的影响[J]. 口腔医学, 2020, 40(1): 35-38.

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