Objective To evaluate the bondTM ng 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 bondTM G-bondTM Plus and Single bondTM 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 bondTM 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 bondTM 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 bondTM 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 bondTM 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 bondTM strength of Single bondTM Universal is significantly higher than that of Clearfil SE bondTM and G-bondTM plus.Single bondTM Universal has strong bondTM ng durablility and can provide good bondTM ng effect in clinical application.%目的 探讨Single bondTM M 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 bondTM (SE组) 、G-bondTM plus (GBp组) 、Single bondTM M 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 bondTM M 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 bondTM G-bondTM plus;Single bondTM Universal粘接强度大, 稳定耐久, 可提供良好的粘接效果.
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