摘要
目的：评估简化乙醇湿粘结技术对龋影响牙本质粘结强度的影响。方法：选取人慢性龋离体第三磨牙36颗去龋备洞后保留龋影响牙本质。随机分为6组,分别使用自制疏水性粘结剂,Prime＆Bond NT（PB）,Adper Single bond plus（SB）进行粘结,堆砌树脂厚度约4~5mm。实验组采用简化乙醇湿粘结法,对照组采用传统水湿粘结法。制作1mm×1mm×8mm的条形微拉伸强度试件,每组选取8个。采用万能材料试验机测试微拉伸强度并记录,观察断裂界面。结果：在自制疏水性粘结剂组中,实验组粘结强度较对照组有显著提高（P〈0.05）。结论：简化乙醇湿粘结技术可以提高CAD界面的粘结强度,尤其是在与疏水性粘结剂联合运用时,有显著提高。
Objective：To evaluate the effect of simplified ethanol wet bonding technique on caries affected dentin（CAD）bonding properties through micro-tensile strength（μTBS）test.Methods：36extracted human molars with coronal dentin caries were selected.The softened carious dentin was removed with a slow speed carbon steel bur.The remaining cavity wall was removed and a relatively flat surface in the same level of CAD lesion was obtained using a high speed diamond bur with water coolant.The teeth were randomly distributed across three groups of bonding agent（Experimental hydrophobic adhesive,Adper Single bond plus,Prime Bond NT）and two subgroups of substrate condition（water- or ethanol-wet）.A 4-5mm high resin crown was built up on the adhesive interface using resin composite,stratified cured.Samples were prepared into beams about 1mm×1mm×8mm forμTBS tests with universal testing machine.8specimens were selected from each group.Results：In the experimental hydrophobic adhesive group,simplified ethanol wet bonding can significantly improve the adhesion bond strength of the CAD.A significant difference was observed.In the SB and PB groups,compared with traditional wet bonding,simplified ethanol wet bonding had higher bond strength,but no significant difference was observed.Conclusion：Simplified ethanol wet bonding technique can improve the bond strength of CAD,especially when combined with hydrophobic adhesive.
出处
《口腔医学研究》
CAS
CSCD
北大核心
2015年第6期619-622,共4页
Journal of Oral Science Research
关键词
简化乙醇湿粘结
龋影响牙本质
微拉伸强度
Simplified ethanol-wet bonding Caries affected dentin Micro-tensile strength test
