目的:研究喷砂和微弧氧化两种金属表面处理方式及树脂粘结剂对钛合金与硬质复合树脂粘结强度和耐久性的影响。方法:应用CAD/CAM技术切削出80个底面直径10 mm、高8 mm的圆柱形钛合金试件。根据表面处理方式分为两组:喷砂组(sandblasting,SB)试件表面进行Al₂O₃ 颗粒喷砂,微弧氧化组(microarc-oxidation,MAO)试件表面处理后形成疏松多孔的陶瓷膜结构。每组内根据是否应用树脂粘结剂分为SB-resin luting-N组(不使用)、SB-resin luting-Y组(使用)、MAO-resin luting-N组(不使用)、MAO-resin luting-Y组(使用)4个亚组。试件与Cemerage硬质复合树脂粘结固化,每组的各一半测试冷热循环0次和5 000次后的粘结强度,对比分析测试结果。扫描电镜观察粘结强度试验前后钛合金试件表面形貌。结果:喷砂联合树脂粘结剂组冷热循环0次后,钛合金与硬质复合树脂的粘结强度最高(16.2±1.8) MPa;微弧氧化未联合树脂粘结剂组冷热循环5 000次后,两者的粘结强度最低(8.9±1.5) MPa,喷砂和微弧氧化未联合树脂粘结剂组冷热循环5 000次后粘结强度分别为(10.7±2.2) MPa和(8.9±1.5) MPa,相比循环0次组降低,差异有统计学意义(P=0.000和P=0.001);喷砂和微弧氧化处理联合树脂粘结剂5 000次冷热循环后粘结强度分别为(15.5±2.1) MPa和(11.7±1.3) MPa,相比循环0次组降低,但差异无统计学意义(P=0.087和P=0.234)。结论:喷砂和微弧氧化两种表面处理方式联合树脂粘结剂均可提高钛合金与硬质复合树脂的粘结强度和耐久性,以喷砂组提高更为显著;目前受微弧氧化技术参数的限制,喷砂效果优于微弧氧化。

Objective: To assess the effects of two surface treatments (sandblasting, SB; microarc-oxidation, MAO) and resin luting on shear bond strength and durability of titanium alloy and composite-resin. Methods: Eighty cylindrical titanium alloy specimens with a diameter of 10 mm and a height of 8 mm were fabricated by CAD/CAM technique. It was divided into two groups according to the surface treatment methods: sandblasting with Al₂O₃ particles on the surface of SB specimens; porous ceramic film structure could be formed on the surface of MAO specimens after surface treatment. Each group was classified into SB-resin luting-N group (not used), SB-resin luting-Y group (used), MAO-resin luting-N group (not used), MAO-resin luting-Y group (used) depending on whether or not resin luting was applied. Each specimen was bonded and cured with the Cemerage resin, and the shear bond strength after 0 and 5 000 thermocycling was tested. The results were statistically analyzed. The surface morphology of titanium alloy specimens before and after the shear bond strength test was observed by scanning electron microscopy (SEM). Results:The shear bond strength between titanium alloy and composite-resin was the highest in the SB combined with resin luting group after 0 thermocycling (16.2±1.8) MPa; was the lowest in MAO group after 5 000 thermocycling (8.9±1.5) MPa. The shear bond strength of SB and MAO surface treatment methods combined without resin luting group after 5 000 thermocycling were (10.7±2.2) MPa and (8.9±1.5) MPa, which were statistically lower than those in the thermocycling 0 (P=0.000 and P=0.001). The shear bond strength of SB and MAO surface treatment methods combined with resin luting group after 5 000 thermocycling were (15.5±2.1) MPa and (11.7±1.3) MPa, respectively, which were lower than those in the thermocycling 0 group, but there was no statistical significance (P=0.087 and P=0.234). Conclusion: Both the surface treatment methods of SB and MAO combined with resin luting can improve the shear bond strength and durability of titanium alloy and composite-resin. The SB combined with resin luting is more significant. At present, the effect of SB is better than that of MAO due to the limitation of technical parameters of micro-arc oxidation.