【摘要】 目的 探讨磁力研磨（MAF）技术对六铝四钒钛（Ti-6Al-4V）合金种植体基台表面形貌、粗糙度、亲水性及耐腐蚀性能的影响，明确不同磁针直径对表面性能优化的作用，为临床表面处理工艺提供依据。方法 将Ti-6Al-4V合金圆柱试样随机分为5组，即未处理组（control组）和磁针直径为0.2 mm、0.5 mm、1.0 mm、1.5 mm的MAF处理组(分别记为MAF_0.2组、MAF_0.5组、MAF_1.0组、MAF_1.5组)。固定其他加工参数，仅改变磁针直径进行MAF处理，通过扫描电子显微镜观察表面形貌变化，光学表面粗糙度仪测量表面粗糙度，接触角测量仪评估亲水性，并采用电化学极化测试分析各组样品在人工唾液中的腐蚀电位(E_corr)、腐蚀电流密度(i_corr)及极化电阻（R_p）。结果 MAF处理可有效去除原始加工痕迹，降低表面粗糙度并改善亲水性，各组间差异具有统计学意义（P<0.05）。其中MAF_1.0组（磁针直径1.0 mm、磁针长度5.0 mm、磁极转速40 Hz、研磨时间60 min）表现最优，其平均粗糙度（Ra）降低至（0.197±0.022）μm，接触角降至78.03°±1.59°，E_corr升高至-0.5661 V,i_corr降至0.0114μA·cm^-2,R_p提高至8.97×10⁶Ω·cm²，均优于其他处理组及control组，显示出最优的综合性能。结论 MAF技术可显著改善Ti-6Al-4V合金种植体基台的表面形貌、粗糙度、亲水性和耐腐蚀性，直径为1.0 mm的磁针进行处理时，表面性能提升效果最为显著，为后续临床表面处理工艺的优化提供了重要实验依据。更多还原

【Abstract】 Objective This study investigates the effects of magnetic abrasive finishing（MAF） technology on the surface morphology, roughness, hydrophilicity, and corrosion resistance of Ti-6Al-4V alloy dental implant abutments. It aims to clarify the role of different magnetic needle diameters in optimizing surface properties and provide a basis for clinical surface treatment processes. Methods Ti-6Al-4V alloy cylindrical specimens were divided into five groups: an untreated control group（control） and MAFtreated groups with magnetic needle diameters of 0.2 mm, 0.5 mm, 1.0 mm, and 1.5 mm(MAF_0.2, MAF_0.5, MAF_1.0, and MAF_1.5). MAF treatment was performed by changing only the magnetic needle diameter while keeping the other processing parameters constant. Surface morphology changes were observed using a scanning electron microscope（SEM）, surface roughness was measured using an optical surface roughness meter, hydrophilicity was assessed using a contact angle measuring instrument, and electrochemical polarization testing was used to analyze the corrosion potential(E_corr), corrosion current density(i_corr), and polarization resistance（R_p） of each group of samples in artificial saliva. Results MAF treatment effectively removed original processing marks, reduced surface roughness, and improved hydrophilicity, with statistically significant differences between groups（P<0.05）. In the MAF_1.0 group（magnetic needle diameter 1.0 mm, magnetic needle length 5.0 mm, magnetic pole rotation speed 40 Hz, grinding time 60 min）, Ra decreased to（0.197 ± 0.022） μm, contact angle decreased to 78.03° ± 1.59°, E_corr increased to-0.5661 V, i_corr decreased to 0.0114 μA·cm^-2, and R_p increased to 8.97×10⁶ Ω·cm², all outperforming other treatment groups and the control group, demonstrating the best overall performance. Conclusion MAF technology can significantly improve the surface morphology, roughness, hydrophilicity, and corrosion resistance of Ti-6Al-4V alloy implant abutments. Magnetic needle treatment with a diameter of 1.0 mm is most effective in improving surface performance, providing an experimental basis for subsequent clinical evaluation.更多还原