Objective The effects of various surface preparation methods with coupling agent on the shear bond strength of orthodontic brackets bonded to different ceramic surfaces. Methods Three kinds of porcelain restoration materials were sampled and produced into specimens. Each material specimens was divided into 4 groups according to the preparation method: SB,HF,SB+Cpand HF+CP. Shear bond strength (SBS) was tested and compared to the different groups. Results The results shows that silane coupling agent (CP).which was used as an auxiliary measures for surface treatment, can enhance the SBS either SB or HF significantly (P<0.05), and the characteristics of CP at this point do not depend on the kind of ceramic restoration material (P>0.05). The CP combined with HF surface treatment can improve the SBS to the clinical requirement. Conclusion These results suggest that the CP as an auxiliary measure can result in the improvement of the SBS for the SB or HF porcelain surface treatment. The HF+CP surface treatment could increase the SBS while the HF preparation is not satisfied with the clinical requirement.%目的:研究四种表面处理方法对三种陶瓷修复体表面处理后与金属托槽间黏结强度的影响.方法:三种不同的瓷粉制作试件并随机分成四个处理组:①酸蚀;②喷砂;③喷砂+偶联剂;④酸蚀+偶联剂.在各组试件表面处理后黏结金属托槽并测量其黏结剪切强度.结果:①经统计学分析,无论对于喷砂还是酸蚀,结合硅烷偶联剂处理后都能显著地提高托槽与瓷修复体表面的黏结强度(P<0.05);而且这种经偶联剂辅助处理后黏结强度提高的特点,是不因为瓷修复体的材料的不同而有显著的差异性的(P>0.05);②酸蚀不同于喷砂,单独处理时达不到临床托槽黏结强度要求,而结合硅烷偶联剂后,其黏结强度有显著的提高(P <0.05);③同一处理方法对不同的陶瓷修复体其黏结剪切强度无统计学差异(P>0.05).结论:偶联剂作为一种辅助处理措施,可以提高喷砂或酸蚀处理后托槽与瓷修复体表面的黏结强度;联合硅烷偶联剂处理,可使单独应用达不到临床托槽黏结要求的酸蚀表面处理方法,达到临床应用要求.
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