【摘要】 目的:通过观察大鼠成骨细胞(osteoblast,OB)在微弧氧化(micro-arc oxidation,MAO)和水热处理形成的TiO2/HA梯度涂层表面的粘附和增殖等情况,评价微弧氧化陶瓷膜表面的生物相容性及微弧氧化-水热处理工艺应用于钛植入材料表面处理的可行性。方法:将纯钛试件共60枚分为微弧氧化处理组(M组)、微弧氧化-水热处理组(M-H组)和纯钛对照组。采用扫描电镜(scanning electron microscopy,SEM)观察表面形貌并用X线衍射(X-ray diffraction,XRD)对其进行成分分析。然后对不同时间点OB细胞在各组材料表面的附着、生长、增殖情况以及碱性磷酸酶(alkaline phosphatase,ALP)活性进行检测,并对实验结果进行统计分析。结果:微弧氧化处理后试件表面呈现多孔状,主要为锐钛矿型TiO2,也包含金红石型TiO2。经过后续水热处理,从扫描电镜照片可以看到试件表面析出一层白色柱形结晶体,同时XRD谱线出现了羟基磷灰石的衍射峰。试件与OB细胞共培养后可见细胞在材料周围生长良好,培养5d后,改性两组的材料表面细胞增殖比纯钛组及空白对照组明显增多。培养7d后,M组和M-H组细胞ALP活性大幅提高,各组间比较均有统计学差异。结论:MAO及水热处理后的TiO2/HA梯度涂层表面能有效提高OB细胞的早期粘附、增殖及ALP活性。更多还原

【Abstract】 Objective:To study the biocompatibility of osteoblast(OB)on pure titanium surface treated by micro-arc oxidation(MAO)and hydrothermal treatment.Methods:60 samples of pure titanium were prepared and separated into three groups:MAO treatment(M group),MAO and hydrothermal treatment(M-H group),Ti group without treatment.Attachment,proliferation and ALP activity of OB cultured on the titanium surfaces were assessed at different time points.All data were statistically analysed.Results:The ceramic film showed excellent biocompatibility with OB.Cell attachment on the M group and M-H group were higher than that on Ti group surface.OB proliferation and ALP activity were higher on M-H group surface than those on the other two surfaces(P<0.05).Conclusion:Titanium surface treated with MAO and hydrothermal treatment exhibit better biocompatibility to OB than that of pure titanium and may increase original cell attachment,proliferation and ALP activity.更多还原