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中华口腔医学研究杂志(电子版) ›› 2011, Vol. 5 ›› Issue (02) : 144 -150. doi: 10.3877/cma.j.issn.1674-1366.2011.02.006

基础研究

乙醇湿黏结对髓室牙本质树脂黏结界面影响的扫描电镜观察
魏裕1, 李彦1,()   
  1. 1.510055 广州,中山大学光华口腔医学院·附属口腔医院·口腔医学研究所
  • 收稿日期:2010-08-23 出版日期:2011-04-01
  • 通信作者: 李彦

Effects of ethanol-wet bonding on the pulp chamber dentin-resin bonding interface: an scanning electron microscope observation

Yu WEI1, Yan LI1,()   

  1. 1.Guanghua School of Stomatology,Institute of Stomatological Research, Sun Yat-sen University, Guangzhou 510055, China
  • Received:2010-08-23 Published:2011-04-01
  • Corresponding author: Yan LI
引用本文:

魏裕, 李彦. 乙醇湿黏结对髓室牙本质树脂黏结界面影响的扫描电镜观察[J/OL]. 中华口腔医学研究杂志(电子版), 2011, 5(02): 144-150.

Yu WEI, Yan LI. Effects of ethanol-wet bonding on the pulp chamber dentin-resin bonding interface: an scanning electron microscope observation[J/OL]. Chinese Journal of Stomatological Research(Electronic Edition), 2011, 5(02): 144-150.

目的

比较乙醇湿黏结与传统水湿黏结条件下髓室牙本质树脂黏结界面的微观结构,以评价乙醇湿黏结对髓室牙本质树脂黏结界面的影响。

方法

12 颗人阻生第三磨牙沿水平方向去除髓室顶暴露髓腔,去除牙髓组织,封闭根管口。 4 颗牙髓室壁表面37%磷酸溶液处理,扫描电镜(SEM)下观察处理前后表面形貌;8 颗牙随机分为4 组(n=2),分别采用传统水湿黏结和乙醇湿黏结技术,用乙醇/水基Single Bond 2(SB)和丙酮基One Step(OS)两种“单瓶”全酸蚀黏结剂进行髓室牙本质与树脂黏结,SEM 观察黏结界面结构。

结果

髓室牙本质与两种黏结剂所形成的黏结界面均无典型的混合层结构;乙醇湿黏结条件下,两种黏结剂与髓室牙本质黏结界面树脂突的长度[SB:(72.26±4.5)μm 和OS:(74.75±3.42)μm]均比水湿黏结条件下[SB:(37.14±4.36)μm 和OS:(40.40±3.19)μm]增加(P <0.05),差异有统计学意义,且长度较均匀。

结论

乙醇湿黏结技术较水湿黏结技术能更有利于树脂黏结剂渗入,从而形成良好的髓室牙本质黏结界面,提高髓室牙本质黏结效果。

Objective

To compare the microstructures of the pulp chamber dentin-resin interfaces formed by using the ethanol-wet bonding and water-wet bonding techniques, so as to evaluate the effects of the ethanol-wet bonding technique on the pulp chamber dentin-resin bonding interface.

Methods

Twelve extracted human impacted third molars were obtained and cut horizontally to expose the pulp chamber.The roofs of the pulp chamber and pulp tissues were removed, and the canal orifices were sealed.Four of them were selected to observe the surface characteristics of the pulp chamber with the scanning electron microscope (SEM) before and after the treatment with 37% phosphoric acid.The other 8 molars were randomly divided into 4 groups(n=2).Two bonding techniques (ethanol-wet bonding and water-wet bonding) and two 'one-bottle'total-etch adhesive systems [ethanol/water-based adhesive Single Bond 2(SB) and acetone-based adhesive One Step (OS)] were applied in the pulp chamber dentin-resin bonding experiments respectively, as per manufacturers' instructions.The bonding interfaces of the 4 groups were examined with SEM.

Results

Typical hybridization zone was not observed in the pulp chamber dentine-resin interfaces of the 4 groups.The formed resin tags were more uniform and significantly longer by using ethanol-wet bonding technique [SB group:(72.26 ± 4.59)μm and OS group:(74.75±3.42)μm] than those by water-wet bonding [SB group:(37.14±4.36)μm and OS group:(40.40±3.19)μm] (P <0.05).

Conclusions

Ethanol-wet bonding technique led to better resin interdiffusion into the pulp chamber dentin, provided more effective dentine-resin interface and enhanced the adhesion effect between the dentin and the resin.

图1 牙黏结试件切片(Vongphan,2005[9]
图2 未经酸处理的髓腔表面(超声清洗前)
图3 未经酸处理的髓腔表面(超声清洗后)
图4 37%磷酸凝胶处理15 s 后髓腔表面(超声清洗前)
图5 37%磷酸凝胶处理15 s 后髓腔表面(超声清洗后)
图6 Single bond 2 黏结界面SEM 观察(传统水湿黏结界面)R:composite resin; RT:resin tag; D:dentin
图7 One Step 黏结界面SEM 观察(传统水湿黏结界面)R:composite resin; RT:resin tag; D:dentin
图8 Single bond 2 黏结界面SEM 观察(乙醇湿黏结界面)R:composite resin; RT:resin tag; D:dentin
图9 One Step 黏结界面SEM 观察(乙醇湿黏结界面)R:composite resin; RT:resin tag; D:dentin
表1 不同处理方法及黏结剂牙本质小管树脂突长度比较(n=20,μm,x±s)
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