人工唾液条件下3种自酸蚀粘接剂与牙本质粘接耐久性研究

Comparative study of three kinds of self-etching adhesives in terms of their dentin-bonding strength and bonding durability with dentin under the condition of the artificial saliva

目的探讨Single bond^(?)Universal等3种不同类型自酸蚀粘接剂与牙本质的粘接强度和耐久性。方法选取2016年5—7月解放军总医院口腔颌面外科拔除的24颗新鲜人离体第三磨牙,随机分为3组,每组8颗,分别选用Clearfil SE Bond(SE组)、G-Bond plus(GBp组)、Single bond^(?)Universal(SBU组)等3种自酸蚀粘接剂与新鲜牙本质粘接并制备试件。每组挑选出完整试件160个,再分为两个亚组(各80个试件),分别在即刻与人工唾液浸泡6个月后行微拉伸粘接强度实验,体视显微镜下观察试件断裂类型。结果 SE组、GBp组、SBU组即刻牙本质粘接强度分别为(55.70±11.07)、(52.85±7.54)和(62.82±8.70)MPa,其中SBU组高于SE组和GBp组,差异有统计学意义(P<0.05)。人工唾液保存6个月后,SE组、GBp组、SBU组牙本质粘接强度分别为(13.51±4.99)、(43.53±6.82)和(49.13±6.58)MPa,3组之间差异均有统计学意义(P<0.05)。6个月时粘接界面观察,SE组断裂模式均为粘接界面断裂;GBp组16个试件为牙本质内聚断裂,4个试件为复合树脂内聚断裂;SBU组28个试件为牙本质内聚断裂,8个试件为复合树脂内聚断裂。结论 Single bond?Universal即刻牙本质粘接强度和人工唾液老化后6个月粘接强度均显著高于Clearfil SE Bond、G-Bond plus;Single bond^(?)Universal粘接强度大,稳定耐久,可提供良好的粘接效果。

Objective To evaluate the bonding strength and durability of three different self-etching adhesives under the condition of the artificial saliva with the micro-tensile test. Methods From May to July 2016,24 freshly extracted,caries-free human third molars were selected and randomly divided into 3 groups,with 8 teeth in each group. Three selfetching adhesives were used,including Clearfil SE Bond,G-bond Plus and Single bond-（？）Universal. The standard specimens were made and selected,we divided the 160 standard specimens into two groups,80 specimens in each group. The immediate micro-tensile bond strength and that after 6 months of soaking in artificial saliva were tested. Fracture type was observed with the microscope. Results The immediate micro-tensile bond strength of SE（n = 80）,GBp（n = 80）and SBU（n = 80）were（55.70 ± 11.07）,（52.85 ± 7.54）and（62.82 ± 8.70）MPa,respectively. The immediate micro-tensile bond strength of SBU group was higher than that of SE and GBp group,and the difference was statistically significant（P〈0.05）. After 6 months of preservation in the articificial saliva,the micro-tensile bond strength of SE,GBp and SBU group were as follows：13.51 ± 4.99）,（43.53 ±6.82）,and（49.13 ± 6.58）MPa,statistical differences among the three groups were significant. The different fracture modes were found in three groups after 6 months in the artificial saliva. In SE,all fractures occurred in interface. In 80 GBp cases,16 fractures occurred in dentin,4 in composite resins. In 80 SBU cases,28 fractures were found in dentin,8 in composite resins. Conclusion The microtensile bond strength of Single bond^TM Universal is significantly higher than that of Clearfil SE Bond and G-Bond plus.Single bond^TM Universal has strong bonding durablility and can provide good bonding effect in clinical application.