目的：采用微剪切方法分析不同浓度碳二亚胺［1-ethyl-3-（3-dimethylaminopropyl）carbodiimide，EDC］乙醇溶液处理牙本质表面对自酸蚀粘接剂粘接强度和断裂模式的影响。方法： 收集离体健康智齿80颗，随机分为5组，每组16颗。低速切割机暴露牙合面中层牙本质后使用两步法自酸蚀粘接剂（Clearfil SE Bond）进行牙本质粘接,所有试件设计为粘接半径1 mm、高3 mm的树脂柱试件。粘接时除空白组按常规步骤完成粘接外, 其余4组在Ⅰ液（底涂剂）处理后，分别采用3种浓度（0.01 mol/L、0.3 mol/L、0.5 mol/L）的EDC乙醇溶液和乙醇溶剂对牙本质表面处理1 min 后涂布Ⅱ液（粘接剂）完成粘接。将所有试件放入含0.5%（质量分数）氯胺T生理盐水浸泡24 h后进行微剪切实验，并在体式显微镜下观察试件断裂模式。结果： 0.01 mol/L、0.3 mol/L、0.5 mol/L EDC处理组、乙醇溶剂处理组的即刻微剪切粘接强度分别为（35.29±8.97） MPa、（40.24±9.68） MPa、（37.38±9.66） MPa、（37.49±7.76） MPa，高于空白组（33.81±7.98） MPa，各组差异均无统计学意义（P>0.05）；断裂模式在各组间差异也无统计学意义（P>0.05）。结论： 不同浓度的EDC乙醇溶液处理对牙本质自酸蚀粘接剂的即刻粘接强度、断裂模式没有影响。

Objective：To evaluate the bonding ability of one representative self-etch adhesive system by applying the micro-shear bond strength test method with different concentrations of carbodiimide ［1-ethyl-3-(3-dimethylaminopropyl) carbodiimide, EDC］ ethanol solution pretreatment. Methods:Extracted sound human third molars were collected from patients ranging 18 to 40 years. In the study, 80 molars were first sectioned to prepare a flat middle coronal dentin surface and then were randomly divided into 5 groups (n=16) according to without/with different surface treatments ［blank control; 80% (volume fraction) ethanol control; EDC ethanol solution of three concentrations (0.01 mol/L, 0.3 mol/L and 0.5 mol/L）］. Each specimen underwent a micro-shear bond strength test and failure mode observation. The data collected were subjected to statistical analysis using one-way ANOVA and post hoc Tukey’s test to analyze the difference of the microshear bond strength, and chi-square test/Fisher’s exact test for the failure mode frequency of the micro-shear bond strength test specimens at a significance level of P=0.05. Results: The micro-shear bond strength of the three concentration EDC treatments were (35.29±8.97) MPa (0.01 mol/L EDC treatment group), (40.24±9.68) MPa (0.3 mol/L EDC treatment group), (37.38±9.66) MPa (0.5 mol/L EDC treatment group) separately; and that of the 80% ethanol group was (37.49±7.76) MPa. All micro-shear bond strength value of the above four groups was statistically higher than that of the blank control group ［(33.81±7.98) MPa］. The immediate micro-shear bond strength and failure mode was of no statistically significant difference among all the groups. It was noticed that the immediate micro-shear bond strength of 0.3 mol/L was higher than that of all the other groups, especially higher than that of the 80% ethanol pretreatment group despite that there was no significant difference among all the groups. And the test of failure mode indicated that the cohesive failure was more common, while the frequency of adhesive failure was rare in each experimental group. Conclusion:EDC pretreatment had no adverse effect on the immediate microshear bond strengths of Clearfil SE Bond. Meanwhile, EDC treatment did not cause more adhesive failure in immediate micro-shear test, which had further denoted what was said above. However, it needs more research to illustrate the anti-enzymatic role of EDC in dentin bonding.