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目的 :比较5种不同表面处理方法对纤维桩黏结强度的影响。方法 :50根纤维桩按照表面处理方法的不同,随机分为5组,A组为硅烷偶联剂组(Clearfil Porcelain Bond Activator,Kuraray),B组为硅烷偶联剂+黏结剂组(A+Clearfil SE Bond,Kuraray),C组为过氧化氢组(30%H2O2溶液),D组为过氧化氢+硅烷偶联剂组(C+A),E组为对照组。分别与树脂黏结剂黏结后,每组再平均分成2个小组,1组37℃生理盐水保存24 h后进行微拉伸强度测试,1组37℃生理盐水保存24 h后进行10000次冷热循环再进行微拉伸强度测试。采用SPSS17.0软件包对数据进行统计学分析。结果:冷热循环前A组~E组的微拉伸黏结强度分别为(6.7±0.7)、(14.4±1.1)、(10.7±0.9)、(16.0±1.0)和(6.7±1.0)MPa,冷热循环后,A组~E组的微拉伸黏结强度分别为(6.0±0.7)、(13.1±0.7)、(9.0±0.7)、(15.0±0.9)和(5.6±0.7)MPa。除硅烷偶联剂组与对照组之间外,其余各组之间差异均有显著性(P<0.05),其中,过氧化氢+硅烷偶联剂组黏结强度最大。各组之间在冷热循环前、后的微拉伸黏结强度差异均有显著性(P<0.05)。结论:温度疲劳循环可以降低5种表面处理的纤维桩与树脂间的黏结强度,30%H2O2溶液处理纤维桩后再使用硅烷偶联剂,可显著增加纤维桩与树脂之间的黏结强度。
Objective: To compare the effects of five different surface treatments on the bond strength of fiber posts. Methods: Fifty fiber posts were randomly divided into five groups according to the surface treatment methods. Group A was a Clearfil Porcelain Bond Activator (Kuraray), Group B was a silane coupling agent + binder (A + Clearfil SE Bond, Kuraray), group C hydrogen peroxide (30% H2O2), group D hydrogen peroxide + silane coupling agent (C + A) and group E as control. After bonding with resin adhesive respectively, each group was equally divided into two groups. One group was stored at 37 ℃ for 24 h, and then microtensile strength test was performed. One group was treated with 37 ℃ saline for 24 h and then 10,000 cycles of thermal cycling Then micro tensile strength test. SPSS17.0 software package for statistical analysis of the data. Results: The microtensile bond strengths of group A to group E before and after hot and cold cycles were (6.7 ± 0.7), (14.4 ± 1.1), (10.7 ± 0.9), (16.0 ± 1.0) and (6.7 ± 1.0) MPa, After hot and cold cycles, the microtensile bond strengths of group A to group E were (6.0 ± 0.7), (13.1 ± 0.7), (9.0 ± 0.7), (15.0 ± 0.9) and (5.6 ± 0.7) MPa, respectively. Except for the silane coupling agent group and the control group, the differences among the other groups were significant (P <0.05), of which hydrogen peroxide + silane coupling agent group had the highest bond strength. The differences of micro-tensile bond strength between the groups before and after the hot-cold cycle were significant (P <0.05). Conclusion: Fatigue cycle can reduce the bond strength between the five kinds of surface-treated fiber posts and resin, and the silane coupling agent can be used after treating the fiber posts with 30% H2O2 solution, which can significantly increase the bond strength between the fiber posts and the resin.