不同牙体预备车针所致玷污层对自粘接型树脂水门汀粘结强度的影响

›› 2019, Vol. 39 ›› Issue (5): 423-426.

不同牙体预备车针所致玷污层对自粘接型树脂水门汀粘结强度的影响

邢春霞¹,聂蓉蓉¹,孟翔峰²,杨洁³

1. 南京大学医学院附属口腔医院
2. 南京市口腔医院
3. 南京大学医学院附属口腔医院高级专家诊疗科

收稿日期:2018-09-25 修回日期:2018-10-14 出版日期:2019-05-28 发布日期:2019-05-21
通讯作者: 杨洁 E-mail:oonj520@163.com
基金资助:
江苏省干部保健科研项目

Effects of smear layer by different burs on the bonding strength of dentin and self-adhesive resin cement

Received:2018-09-25 Revised:2018-10-14 Online:2019-05-28 Published:2019-05-21
Contact: Jie Yang E-mail:oonj520@163.com

摘要/Abstract

摘要： 目的评价不同车针所致牙本质表面玷污层性状对自粘接型树脂水门汀粘接强度的影响。方法将36颗新鲜离体、无龋的人第三恒磨牙暴露出牙本质表面，随机分为两组：A组用标准粒度金刚砂车针（蓝标）进行粗磨；B组用标准粒度+细粒度金刚砂车针（黄标）进行粗磨并进一步细磨抛光。处理后的牙齿分别与3种自粘接型复合树脂水门汀：Clearfil SA Cement（SC）、MultilinkSpeed（MS）、RelyX U200(RX)粘接制成微拉伸试件，试件在水中存储24 h后进行微拉伸强度测试。使用双因素方差分析对牙本质表面处理、树脂水门汀类型进行分析，并判断两者间的交互作用。结果扫描电镜观察到A组牙本质表面粗糙，玷污层较厚，牙本质小管口未完全堵塞；B组牙本质表面粗糙程度降低，牙本质小管口完全堵塞，玷污层变薄。统计结果显示不同牙本质表面处理方法、自粘接树脂水门汀类型均会对粘接强度产生显著影响（P＜0.05），但两者之间无显著的交互作用；SC、RX和MS的B组粘接强度均低于A组，牙本质表面使用蓝标车针研磨后，3种树脂水门汀粘接强度之间没有显著差异，经过黄标车针抛光后，MS的粘接强度显著低于SC和RX，但SC和RX之间无显著差异。断裂模式计数显示3种树脂水门汀断裂模式主要为界面断裂。结论牙本质表面玷污层性状及自粘接型树脂水门汀类型都会对粘接强度产生影响。

关键词: 自粘接型复合树脂水门汀, 牙本质, 玷污层, 微拉伸强度

Abstract: Objective To evaluate the effects of smear layer characteristics of dentin surface on bond strength of self-adhesive resin cement. Methods The study was conducted with 36 fresh, extracted non-carious, human third molars with the dentin surface exposed. Included samples were randomly divided into two groups, which were ground roughly with standard-grain diamond burs (blue label; group A), and ground roughly with standard-grain + fine-grain diamond burs (yellow label) combined with further fine grinding and polishing (group B), respectively. The treated teeth were bonded with three self-adhesive composite resin cements, including Clearfil SA Cement (SC), MultilinkSpeed (MS) and RelyX U200 (RX), to make micro-tensile samples. The samples were stored in water for 24h and then the micro-tensile bond strength was tested. Two-factor ANOVA was used to analyze dentin surface treatment and resin cement types, and to determine the interaction between the two factors. Results Scanning electron microscopy showed that the dentin surface of group A was rough, the smear layer was thick and the orifice of dentinal tubules was not completely blocked. In group B, the roughness of dentin surface decreased, dentinal tubule orifice was completely blocked and smear layer became thinner. Statistical results showed that different dentin surface treatment methods and types of self-adhesive resin cement had significant effects on bond strength (P<0.05), but there was no significant interaction between them. The adhesive strengths of SC, RX and MS in group B were all lower than those of group A. There was no significant difference in the adhesive strength of the three kinds of resin cement after grinding the dentin surface with blue label bur. After being polished with yellow label bur, the adhesive strength of MS was significantly lower than that of SC and RX, but there was no significant difference between SC and RX. Furthermore, the fracture mode counting indicated that the bone fracture mode of the three resin cements was mainly interfacial fracture. Conclusion Smear layer characteristics of dentin surface and types of self-adhesive resin cement can both have certain impacts on the bond strength.

Key words: self-adhesive resin cement, dentin, smear layer, micro-tensile strength

中图分类号:

R781.1

邢春霞聂蓉蓉孟翔峰杨洁. 不同牙体预备车针所致玷污层对自粘接型树脂水门汀粘结强度的影响[J]. , 2019, 39(5): 423-426.

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