目的：研究3种偶联剂对铸造纯钛试件与硬质复合树脂结合强度的影响。方法用牙科铸钛的方法制作40个直径8mm、高3mm的圆盘状纯钛试件，与树脂粘接面用碳化硅砂纸在流水下打磨、Al2O3喷砂、4%氢氟酸（HF）酸蚀。试件随机分为4组，每组10个。对照组（A组）、硅烷偶联剂组（B组）、AlloyPrimer组（C组）、Metalphotoprimer组（D组）。然后在试件表面均匀涂布硬质复合树脂，检测其与纯钛试件的剪切强度，并进行统计学分析，同时对断裂面进行扫描电镜（SEM）观察。结果 A、B、C、D组剪切强度分别为（9.773±0.67）、（11.463±0.82）、（14.224±0.75）、（13.157±0.73）MPa。A组与B、C、D组的剪切强度相比差异有统计学意义（P<0.01），B组与C、D组的剪切强度相比差异有统计学意义（P<0.01），C组与D组的剪切强度相比差异无统计学意义（P>0.05）。结论 KH-570硅烷偶联剂、AlloyPrimer偶联剂、Metalphotoprimer偶联剂可以显著提高钛与硬质复合树脂的结合强度，KH-570硅烷偶联剂处理组的结合强度低于AlloyPrimer偶联剂组和Metalphotoprimer偶联剂组。%Objective To investigate the influence of three primers on the shear bond strength between cast titanium (Ti) and composite resin. Methods The disks (n=40) were cast by commercially pure (CP) Ti,which diameter were 8 mm and thick were 3 mm. The titanium surfaces were polished with silicon carbide sand papers under running water and then treated by sandblasting and acid (4%HF) etching. They were divided into four groups: control group (group A), treated with KH-570 (group B), treated with Alloy Primer (group C), treated with Metal photo primer (group D). After treatment, the specimens were evaluated for their shear bond strengths by universal testing machine. The values were statistically analyzed. The fractured surfaces were observed by scanning electron microscope (SEM). Results The shear bond strengths of group A, B, C, D were (9.773±0.67), (11.463±0.82) , (14.224±0.75), (13.157±0.73) MPa. There were significant differences in bond strength between A and B, C, D (P<0.01). B and C, D had significant differences (P<0.01). C and D had no significant differences (P>0.05). Conclusion KH-570, Alloy Primer, Metal photo primer significantly improve the bond strength of ceramage composite resin to cast titanium. KH-570 group bonding strength is lower than the the Alloy Primer group and Metal photo primer group.
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