Department of Prosthodontics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, People's Republic of China.
Biomed Mater. 2009 Dec;4(6):065012. doi: 10.1088/1748-6041/4/6/065012.
It is well known that the growth of osteoblast cultured on titanium with nanotube layers can be significantly increased compared to unanodized surfaces. In the current study, the corrosion behavior of titanium with nanotube layers was studied in naturally aerated Hank's solution using open circuit potentials (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization tests. The electrochemical results indicated that TiO2 nanotube layers on titanium showed a better corrosion resistance in simulated biofluid than that of smooth-Ti. The OCP, corrosion rate (I(corr)), passive current density (I(pass)) and the oxygen evolution potential (E(o)) were significantly influenced by titanium oxide nanotube layers acquired by anodization. The anatase nanotube layer showed higher OCP and smaller current density than the amorphous nanotube layer. EIS analysis showed that the annealing had a significant effect on the corrosion resistance of the outer tube layer (R(t)), but little effect on the corrosion resistance of the inter-barrier layer (R(b)) for nanotube layers. The results suggested that titanium with TiO2 nanotube layers has an adequate electrochemical behavior for use as a dental implant material.
众所周知，与未经阳极氧化处理的表面相比，培养在具有纳米管层的钛上的成骨细胞的生长可以显著增加。在本研究中，使用开路电位 (OCP)、电化学阻抗谱 (EIS) 和动电位极化测试研究了具有纳米管层的钛在自然充气 Hank's 溶液中的腐蚀行为。电化学结果表明，与光滑-Ti 相比，TiO2 纳米管层在模拟生物流体中表现出更好的耐腐蚀性。OCP、腐蚀速率 (I(corr))、钝化电流密度 (I(pass)) 和析氧电位 (E(o)) 均受到阳极氧化获得的氧化钛纳米管层的显著影响。锐钛矿纳米管层的 OCP 较高，电流密度较小。EIS 分析表明，退火对纳米管层外管层 (R(t)) 的耐腐蚀性有显著影响，但对阻挡层 (R(b)) 的耐腐蚀性影响很小。结果表明，具有 TiO2 纳米管层的钛具有足够的电化学行为，可用作牙科植入物材料。
