Objective: To investigate the efect of different surface treatments technology on the microtensile bond strength of fiber post and resin core. Methods: 30 quartz fiber posts were randomly assigned to six groups according to the chemical surface treatments, treat with contax (Group A): treat with silane agent-(Group B), treat with 5% HF (Group C), Group D were treated with 5% HF, then with silane agent, treat with 24% Hydrogen peroxide (Group E), treat with 24 Hydrogen peroxide, then with silane agent (Group F). For the microtensile nontrimming technique, 15 beam-shaped specimens per group were obtained. Each specimen was loaded in tension until failure and the fracture mode present were observed. All the results were analyzed statistically. Results: Compare groups of the microtensile bond strength, Group F > Group D> Group E> Group C> Group B> Group A, there were no significant differences (P>0.05) between group A and group B, group C and group E, group D and group F. The microtensile bond strength of group C D E F were significantly higher than group A B.There were significant differences (P<0.05) between group C and group D, there were significant differences(P<0.05)between group E and group F. While there were no differences between a11 the groups in fracture mode (P>0.05). Conclusion: Except treat the quartz fiber post with silane or Contax alone, treat with 5% HF or treat with 24% Hydrogen peroxide had a positive efect in improving the bonding strength of fiber post and resin core. After treat with 5% HF or treat with 24% Hydrogen peroxide and then with silane agent are more useful and convenient methods to improve the adhesion of the quartz fiber post.%目的:通过微拉伸粘接强度测试法测试在纤维桩表面经过6种不同的处理后与核树脂的牯接强度,探索何种表面处理方法能显著提高纤维桩与核树脂的粘接强度,为临床应用提供参考.方法:将30根石英纤维桩随机分成6组,每组5根.A组纤维桩表面涂布粘接剂,B组涂布硅烷处理剂,吹干后涂牯接剂,C组5％氢氟酸酸蚀30sec,流水冲洗吹干后处理同A组,D组5％氢氟酸酸蚀30sec,流水冲洗吹干后处理同B组,E组24％双氧水处理,后操作同A组,F组24％双氧水处理后操作同B组.在桩周分层固化核树脂,用低速锯沿纤维桩外周平行片切,再垂直粘接面片切成横截面约0.9mm×0.9mm的长方柱状试件,每组15个,用微拉伸粘接强度测试法测试纤维桩与核树脂的微拉伸粘接强度,体视显微镜观察断裂类型.结果:A组微拉伸粘接强度8.78±2.20MPa,B组9.35±1.92MPa,C组15.50±2.87MPa,D组22.98±3.24MPa,E组16.64±2.70MPa,F组24.88±3.9 0MPa.用氢氟酸酸蚀的C组和D组和用双氧水处理的E组和F组的微拉伸牯接强度明显高于A组B组(P＜0.05).用氢氟酸酸蚀后再硅烷化处理的D组比C组、用双氧水处理的F组比E组微拉伸粘接强度差异有统计学意义,A组和B组微拉伸粘接强度差异无统计学意义(P＞0.05).各组纤维桩与核树脂的断裂模式为粘接破坏.结论:单纯用硅烷偶联剂处理石英纤维桩表面不能明显提高粘接强度,用氢氟酸酸蚀和双氧水处理能提高石英纤维桩的粘接强度,经氢氟酸酸蚀和双氧水处理后再硅烷化处理能提高石英纤维桩的牯接强度.
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