碳二亚胺预处理对两种酸蚀-冲洗粘接剂粘接性能的影响  

Effect of Pretreatment by Carbodiimide on Bonding Properties of Two Kinds of Etch-and-rinse Adhesives

作　　者：郑月梅 鄢国伟 周凯璇 陈月 谢翠柳 ZHENG Yuemei;YAN Guowei;ZHOU Kaixuan;CHEN Yue;XIE Cuiliu(Oral & Maxillofacial Reconstruction and Regeneration Laboratory, Southwest Medical University, Luzhou 646000, China;Department of Endodontics, Affiliated Stomatology Hospital of Southwest Medical University, Luzhou 646000, China;Department of Prosthodontics, Affiliated Stomatology Hospital of Southwest Medical University, Luzhou 646000, China.)

机构地区：[1]西南医科大学口颌面修复重建与再生实验室,四川泸州646000 [2]西南医科大学附属口腔医院牙体牙髓科,四川泸州646000 [3]西南医科大学附属口腔医院修复科,四川泸州646000

出　　处：《口腔医学研究》2020年第11期1055-1059,共5页Journal of Oral Science Research

摘　　要：目的:探究碳二亚胺(carbodiimide,EDC)预处理对两种酸蚀-冲洗粘接剂与牙本质的粘接性能的影响。方法:人类离体第三磨牙64颗随机分为8组(n=8)。S、Sa组:预处理+乙醇/水基粘接剂(EDC+SB2);S0、S0a组:无预处理+乙醇/水基粘接剂(去离子水+SB2);P、Pa组:预处理+丙酮基粘接剂(EDC+PB);P0、P0a组:无预处理+丙酮基粘接剂(去离子水+PB)。Sa、S0a、Pa、P0a组进行冷热循环模拟老化实验。各组随机抽取6个试件测定剪切强度后观察断裂模式,剩余2个试件SEM观察粘接界面微观结构。结果:剪切强度S>P,S>S0,Sa>S0a,Pa>P0a,差异有统计学意义(P<0.05);老化实验后各组剪切强度均下降,但S与Sa,P与Pa之间差异无统计学意义(P>0.05);粘接剂、EDC、老化单独主效应对剪切强度有显著影响(P<0.05),而二阶和三阶交互效应对粘接强度的影响均不具有统计学意义(P>0.05)。即刻组混合断裂为主,老化组界面断裂为主。SEM观察示即刻组混合层较完整,老化组S0a与P0a裂隙最明显。结论:EDC预处理能够提高SB2即刻剪切强度,对SB2和PB都具有一定的粘接耐久性,并呈现较好的微观粘接界面。Objective:To evaluate the effect of pretreatment by carbodiimide(EDC)on bonding properties of two kinds of etch-and-rinse adhesives to dentin.Methods:64 human third molars were collected and randomly divided into 8 groups(n=8).Group S,Sa:Pretreatment+ethanol/water-based adhesive(EDC+SB2);Group S0,S0a:No pretreatment+ethanol/water-based adhesive(deionized water+SB2);Group P,Pa:Pretreatment+acetone-based adhesive(EDC+PB);Group P0,P0a:No pretreatment+acetone-based adhesive(deionized water+PB).Group Sa,S0a,Pa,and P0a were conducted thermocycling aging test.6 specimens were randomly selected from each group to measure the shear bond strength and observe the fracture mode,and the remaining 2 specimens were used to observe the microstructure of the bonding interface under scanning electron microscope(SEM).Results:The shear bond strength of group S was higher than that of group P,group S was higher than group S0,group Sa was higher than group S0a,and group Pa was higher than group P0a(P<0.05).After aging treatment,the shear bond strength of each group decreased,and there were no significant differences between group S and Sa,and group P and Pa(P>0.05).The main effect of adhesives,EDC,and aging treatment alone was significant(P<0.05),but the effect of the second and third order interaction on shear bond strength were not significant(P>0.05).The main fracture was mixed fracture in the immediate groups and interface fracture in the aging groups.SEM observation showed that the hybrid layer was intact in the immediate groups.There were cracks in the hybrid layer in the aging groups,and the cracks were the most obvious in the S0a and P0a groups.Conclusion:EDC pretreatment can improve the immediate shear bond strength of SB2,maintain bonding durability for both SB2 and PB to some extent,and obtain a better microscopic bonding interface.

关 键 词：碳二亚胺 牙本质粘接剂 剪切强度 

分 类 号：R78[医药卫生—口腔医学]