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目的研究低温等离子体表面处理和传统纤维桩表面处理对纤维桩与树脂材料的粘结强度影响,得出有效可行的纤维桩表面处理方法。方法玻璃纤维桩分组,A组无特殊处理;B组经氧气低温等离子体表面处理15 min;C组30%H_2O_2浸泡10 min后硅烷化1 min;D组50μm Al_2O_3喷砂后硅烷化1 min。通过微推出测试、三点弯曲强度检测、扫描电镜观察方法得到处理后纤维桩的粘结强度、三点弯曲强度、纤维桩的表面形态。结果低温等离子体处理组纤维桩与树脂界面的粘结强度最高,纤维桩三点弯曲强度与无处理组比较无显著差异。结论低温等离子体表面处理技术与H_2O_2和喷砂后涂布硅烷偶联剂处理相比粘结强度提升更高,且不影响纤维桩本身的机械性能,可以应用于临床。
Aim To study the influence of surface treatment of low temperature plasma and surface treatment of traditional fiber post on the bond strength between fiber post and resin material, and to find an effective and feasible method for surface treatment of fiber post. Methods Group A was treated by glass fiber post-mortem without any special treatment. Group B was treated by low-temperature oxygen plasma for 15 min. Group C was immersed in 30% H 2 O 2 for 10 min and then silanized for 1 min. Group D was sandblown for 1 min after sand blasting of 50 μm Al 2 O 3. The bond strength, three-point bending strength and surface morphology of the fiber post were obtained by micro-launch test, three-point bending strength test and scanning electron microscope observation. Results The bond strength between the fiber post and the resin interface was the highest in the low-temperature plasma treatment group. The three-point bending strength of the fiber post did not show significant difference compared with the untreated group. Conclusion Compared with H 2 O 2 and silane coupling agent after sandblasting, the low temperature plasma surface treatment technology can improve the bond strength without affecting the mechanical properties of the fiber post itself and can be applied to clinic.