Park Il Song, Lee Min Ho, Bae Tae Sung, Seol Kyeong Won
Department of Dental Biomaterials and Institute of Oral Bioscience, School of Dentistry, Chonbuk National University, Chonbuk 561-756, South Korea.
J Biomed Mater Res B Appl Biomater. 2008 Feb;84(2):422-9. doi: 10.1002/jbm.b.30887.
Anodic oxidation is an electrochemical treatment that can be used to control the thickness of an oxide layer formed on a titanium surface. This procedure has the advantage of allowing the ions contained in an electrolyte to deposit onto the oxide layer. The characteristics of a layer treated with anodic oxidation can vary according to the type and concentration of the electrolytes as well as the processing variables used during anodic oxidation. In this study, the constant electrolyte for anodic oxidation was a mixed solution containing 0.02 M DL-alpha-glycerophosphate disodium salt and 0.2M calcium acetate. Anodic oxidation was carried out at different voltages, current densities, and duration of anodic oxidation. The results showed that the current density and variation in the duration of anodic oxidation did not have a large effect on the change in the characteristics of the layer. On the other hand, the size of the micropores was increased with increasing voltage of anodic oxidation, and anatase and rutile phases were found to co-exist in the porous titanium dioxide layer. In addition, the thickness of the oxide layer on titanium and the characteristic of corrosion resistance increased with increasing voltage. The MTT test showed that the cell viability was increased considerably as a result of anodic oxidation. The anodizing voltage is an important parameter that determines the characteristics of the anodic oxide layer of titanium.
阳极氧化是一种电化学处理方法，可用于控制在钛表面形成的氧化层的厚度。该过程的优点是能使电解质中所含的离子沉积到氧化层上。经阳极氧化处理的氧化层的特性会因电解质的类型和浓度以及阳极氧化过程中所使用的工艺变量而有所不同。在本研究中，用于阳极氧化的恒定电解质是一种含有0.02M DL-α-甘油磷酸二钠盐和0.2M醋酸钙的混合溶液。阳极氧化在不同的电压、电流密度和阳极氧化持续时间下进行。结果表明，电流密度和阳极氧化持续时间的变化对氧化层特性的改变影响不大。另一方面，随着阳极氧化电压的升高，微孔尺寸增大，且在多孔二氧化钛层中发现锐钛矿相和金红石相共存。此外，钛上氧化层的厚度和耐腐蚀特性随电压升高而增加。MTT试验表明，阳极氧化使细胞活力显著提高。阳极氧化电压是决定钛阳极氧化层特性的一个重要参数。
