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目的：观察不同生物活性盖髓材料在初始凝固及完全凝固后，与自酸蚀或酸蚀冲洗粘接系统之间的粘接强度。方法：制备三氧化矿物凝聚体（mineral trioxide aggregate，MTA）、i Root BP Plus（BP）及 i Root FS（FS）试件各 60个，分成三组，分别在材料初始凝固时间（MTA 4 h，BP 2 h，FS 20 min）、24 h、7 d 三个时间点对材料表面进行粘接处理，将各材料组随机分为两组，分别用通用粘接剂（Single Bond Universal，SBU）自酸蚀模式或酸蚀冲洗模式进行粘接（n=10），限制粘接面积为直径 3 mm 圆形，上方制作复合树脂柱后测试其剪切强度并记录断裂模式，计算剪切粘接强度值后采用 SPSS 19.0 软件中的方差分析方法进行统计分析。采用扫描电镜观察凝固后材料表面形貌及经过不同酸蚀处理后的表面微观形态。结果：三种材料的自酸蚀和酸蚀冲洗粘接强度在初始凝固、7 d 时的粘接强度比较均无统计学差异（P<0.05）；凝固 24h 后，MTA 的自酸蚀和酸蚀冲洗粘接强度均显著高于 FS 与 BP（P<0.05）；同种材料完全凝固后粘接强度均显著高于初始凝固组；各组试样断裂均为盖髓材料内聚破坏。扫描电镜下可见三种材料表面特征性晶体结构，MTA 表面晶体较另外两者大；经酸蚀处理后，三种材料表面晶体特征均有不同程度破坏。结论：在本研究范围内，FS 在较短初始凝固时间即可获得一定的粘接强度，与初始凝固时 MTA 和 BP 粘接强度无显著差异。在临床条件下可以在盖髓材料初始凝固（20min）后进行树脂直接修复，提高临床效果与效率。
OBJECTIVE: To observe the adhesive strength of self-etching or acid-etching adhesive systems after initial coagulation and complete coagulation of different bioactive pulp capping materials. Methods: Sixty four mineral trioxide aggregates (MTA), i Root BP Plus (BP) and i Root FS (FS) were prepared and divided into three groups. The initial solidification time (MTA 4 h , BP 2 h, FS 20 min), 24 h and 7 d respectively. Each material group was randomly divided into two groups and each group was treated with single bond universal (SBU) Self-etching mode or acid etching mode bonding (n = 10), limiting the bonding area of 3 mm in diameter circular, the top of the composite resin column after the test shear strength and record the fracture mode, calculate the shear bond Statistical analysis was performed using analysis of variance (ANOVA) using SPSS 19.0 software. Scanning electron microscopy was used to observe the surface morphology of the solidified material and the microscopic morphology of the surface after different acid etching treatments. Results: The self-etching and acid-etching adhesive strength of the three materials were not significantly different at the initial setting (P <0.05). After 24 h of solidification, the self-etching and acidity of MTA The results show that the adhesion strength of the same material is significantly higher than that of FS and BP (P <0.05). The bonding strength of the same material after the complete solidification is significantly higher than that of the initial solidification group. Scanning electron microscopy shows the characteristic crystal structures of the three material surfaces. The MTA surface crystals are larger than the other two. After acid etching, the crystal features of the three materials have different degrees of damage. Conclusion: Within the scope of this study, FS can obtain a certain bonding strength at a short initial setting time, which is not significantly different from the initial bonding strength of MTA and BP. Under clinical conditions, the resin can be directly repaired after initial solidification of pulp capping material (20min) to improve the clinical effect and efficiency.