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直径1.25mm的玻璃纤维桩24根随机分为4组,用300mL/L过氧化氢(H)、40g/L氢氟酸(F)、320g/L磷酸(P)和蒸馏水(对照组)对纤维桩进行表面处理,并于表面涂布树脂黏结剂后用树脂水门汀将其黏结于树脂模具中。试件在万能材料试验机上进行推出实验。结果:F组黏结强度均值最高(30.28±2.36)MPa,其次为H组(26.15±1.56)MPa,P组(23.71±3.47)MPa,对照组(C组)最小(22.39±2.48)MPa。单因素方差分析及多重比较显示:F组与H组、P组、C组之间有统计学差异(P<0.05);H组与P组、C组之间有统计学差异(P<0.05);P组与C组之间无统计学差异(P>0.05)。结论:用300mL/L过氧化氢、40g/L氢氟酸对纤维桩表面进行处理,可有效提高纤维桩与树脂黏结强度。
Twenty-four glass fiber posts with a diameter of 1.25 mm were randomly divided into 4 groups and treated with 300 mL / L hydrogen peroxide (H), 40 g / L hydrofluoric acid (F), 320 g / L phosphoric acid (P) and distilled water Fiber post surface treatment, and after the surface coating resin binder with resin cement to bond it in the resin mold. Specimens are tested on a universal material testing machine. Results: The average bond strength of group F was the highest (30.28 ± 2.36) MPa, followed by group H (26.15 ± 1.56) MPa, group P (23.71 ± 3.47) MPa and group C (22.39 ± 2.48) MPa. One-way analysis of variance and multiple comparisons showed that there was a significant difference between group F and group H, group P and group C (P <0.05); There was a significant difference between group H and group P and group C (P <0.05 ). There was no significant difference between P group and C group (P> 0.05). Conclusion: The surface of the fiber post treated with 300mL / L hydrogen peroxide and 40g / L hydrofluoric acid can effectively improve the bond strength between the fiber post and the resin.