EDTA和EDC预处理对两步法自酸蚀粘接剂粘接强度的影响  

Effect of Pretreatment with EDTA and EDC on Bond Strength of Two-step Self-etching Adhesive

作　　者：邓婷 刘敏 刘雯 王雯 谢翠柳 DENG Ting;LIU Min;LIU Wen;WANG Wen;XIE Cuiliu(Department of Prosthodontics, the Affiliated Stomatology Hospital of Southwest Medical University, Luzhou 646000, China;Oral & Maxillofacial Reconstruction and Regeneration Laboratory, Southwest Medical University, Luzhou 646000, China)

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

出　　处：《口腔医学研究》2020年第3期221-225,共5页Journal of Oral Science Research

基　　金：西南医科大学附属口腔医院青年项目(编号:201806)。

摘　　要：目的:探讨EDTA和EDC预处理对两步法自酸蚀粘接剂粘接强度及粘接耐久性的影响。方法:第三磨牙56颗根据表面处理方式及是否老化处理随机分成8组(n=7),A、A1组:Clearfil SE Bond;B、B1组:17%EDTA+Clearfil SE Bond;C、C1组:0.3 mol/L EDC+Clearfil SE Bond;D、D1组:17%EDTA+0.3 mol/L EDC+Clearfil SE Bond。A1、B1、C1、D1组试件进行老化处理。每组随机抽取5个试件检测粘接强度,观察、统计断裂模式;每组其余2个试件观察纵剖面形貌。结果:D组即刻粘接强度最高,与A组比较差异有统计学意义(P<0.05);C组与C1组、D组与D1组比较差异无统计学意义(P>0.05),具有粘接耐久性。混合断裂是主要的断裂模式,各组比较差异无统计学意义。B、B1和D、D1组混合层树脂突增多增长,C1、D1组混合层未见明显裂纹。结论:17%EDTA+0.3 mol/L EDC预处理可以提高两步法自酸蚀粘接剂的即刻粘接强度,并具有粘接耐久性。Objective:To study the effect of pretreatment with EDTA and EDC on the bond strength of two-step self-etching adhesive.Methods:56 third molars were randomly divided into 8 groups according the dentin surface treatment and whether or not aging(n=7),group A and A1:Clearfil SE Bond;group B and B1:17%EDTA+Clearfil SE Bond;group C and C1:0.3 mol/L EDC+Clearfil SE Bond;group D and D1:17%EDTA+0.3 mol/L EDC+Clearfil SE Bond.Specimens of A1,B1,C1 and D1 were conducted aging test.5 specimens were randomly selected from each group to test the bond strength and analyze the failure mode.The longitudinal profile morphology of the remaining 2 specimens in each group was observed.Results:Group D had the highest immediate bond strength,and the difference with group A was statistically significant(P<0.05).The difference between group C and C1,group D and D1 was no statistically significant(P>0.05).Mixed fracture was the main failure mode,and the difference was no statistically significant.Resin tags in group B,B1,D and D1 were more and longer than other groups,and no cracks were found in the mixing layer of group C1 and D1.Conclusion:Pretreatment with 17%EDTA+0.3 mol/L EDC can improve immediate dentin bond strength of two-step self-etching adhesive and the adhesion is durable.

关 键 词：乙二胺四乙酸 碳二亚胺盐酸盐 牙本质 粘接强度 

分 类 号：R78[医药卫生—口腔医学]