ErCr:YSGG激光对牙本质界面粘结强度及形态结构的影响

›› 2018, Vol. 38 ›› Issue (10): 894-897.

ErCr:YSGG激光对牙本质界面粘结强度及形态结构的影响

韩光政¹,熊正慧¹,陈亚明²

1. 苏州口腔医院
2. 南京医科大学口腔医学院

收稿日期:2017-07-26 修回日期:2017-08-23 出版日期:2018-10-28 发布日期:2018-10-30
通讯作者: 熊正慧 E-mail:xiong2345@126.com

Influence of ErCr:YSGG Laser Irradiation on adhesion of two adhesive systems to dentin

Guang Zheng HAN¹,Zheng-Hui XIONG ³

Received:2017-07-26 Revised:2017-08-23 Online:2018-10-28 Published:2018-10-30
Contact: Zheng-Hui XIONG E-mail:xiong2345@126.com

摘要/Abstract

摘要： 目的：研究ErCr:YSGG激光在不同粘结机理作用下对牙本质黏结剂黏结强度和微观形态的影响。方法：20颗完整无龋的人第三磨牙，去除咬合面釉质，随机分为4组 (n=5)：第1组：激光预备+全酸蚀粘结剂；第2组：常规预备+全酸蚀粘结剂；第3组：激光预备+自酸蚀粘结剂；第4组：常规预备+自酸蚀粘结剂。复合树脂粘结至牙面制成1.0mm*1.0mm*10mm长方体试样，微拉伸测试黏结强度并进行统计学分析。体视显微镜下观察断裂类型，每组随机选取2个断裂前样本及粘结前样本行扫描电镜观察。另4颗分为2组（n=2）分别做激光预备和常规预备后电镜观察粘结前界面。结果：黏结强度第4组最低（12.37±3.12Mpa），与其它3组有统计学差异（P<0.01），其他3组间无统计学差异（P>0.05）；断裂类型多为黏结剂断裂的混合破坏，各组断裂类型间无统计学差异(P>0.05)；扫描电镜观察第1-3组混合层薄而致密，树脂突长而粗，第4组混合层不均一，树脂突短而细。水激光预备样本的牙本质小管开放，牙本质表面清洁、无热损伤痕迹。常规预备样本的牙本质小管封闭，表面玷污层较厚。结论：ErCr:YSGG激光可显著提高自酸蚀粘结剂的粘结强度。

关键词: ErCr:YSGG激光, 微拉伸强度, 扫描电镜, 粘结剂

Abstract: Abstract：Objective To investigate the effects of ErCr:YSGG Laser Irradiation on microtensile bond strength of two adhesive systems to dentin.Methods: 20 freshly extracted intact human molars were prepared and randomly divided into four groups(n=5): group1 : Cut by laser +adhension with ONE—Step Plus; group2: Cut by traditonal methods +adhension with ONE—Step Plus;group3: Cut by laser +adhension with +Futurabond DC;group4: Cut by traditonal methods + adhension with +Futurabond DC. Then a resin composite buildup was made for each specimen about 10mm, which was sectioned along its long axis to obtain 15 beams(1.0mm×1.0mm) every subgroup for the microtensile bond strength(MTBS) test. Fracture sites were observed using a light microscope. Statistical analysis was performed using one-way ANOVA and Tukey’s tests with the probability level set at α= 0.05.Morphologic structure of the adhesive interfaces was examined by scanning electron microscopy (SEM). Results: Mean bonding strengths（MPa）for each group were16.37±3.46， 17.74±3.92，16.48±2.85，12.37±3.71Mpa. Group4 had the lowest bond strength（P <0.05）. Conclusions:Er,Cr：YSGG laser can improve the effect on bonding between dentin and self-etched resin cement.

Key words: Er,Cr：YSGG laser, Microtensile bond strength, SEM , Adhesive system

韩光政熊正慧陈亚明. ErCr:YSGG激光对牙本质界面粘结强度及形态结构的影响[J]. , 2018, 38(10): 894-897.

Guang Zheng HAN Zheng-Hui XIONG. Influence of ErCr:YSGG Laser Irradiation on adhesion of two adhesive systems to dentin[J]. , 2018, 38(10): 894-897.

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