Examining electrochemical surface treatment on dental Titanium

• Main Authors: Wen-You Zeng, 曾文佑
• Other Authors: Shih-Ching Wu
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/56702514012188142510

碩士 === 中臺科技大學 === 醫學工程暨材料研究所 === 98 === This study investigated surface modification on metal implants in order to enhance their bioactive properties. Clinical research was conducted according to the following two phases. First, hydroxyapatite (HA) was coated on an anodized surface of commercially pure titanium (c.p. Ti) by electrolytic deposition. Second, the micro-network structure of the Ti-20Cr alloy surface was anodized in a NaOH solution. As part of the first stage in this study’s research, the fabrication of a hydroxyapatite coating grown from an oxide structure was examined. An anodic oxide layer was grown on c.p. Ti with a surface anodized in 3 M of a H2SO4 solution at room temperature. This anodization process was carried out at 100 V potentials, resulting in a porous oxide structure. Hydroxyapatite was electrodeposited on the anodized surface of c.p. Ti, which formed an HA layer that adhered tightly to the surface. The corrosion resistance of c.p. Ti was also improved by the use of the anodization treatment, as analyzed by a potentio-dynamic polarization test. Finally, osteoblast-like cells that had cultured on the HA coating surface were found to have proliferated well. The second phase in this study includes the fabrication of a micro-network structure of the Ti-20Cr alloy’s surface by an electrochemical method. A Ti-20Cr specimen was anodized in NaOH. The surface of the anodized Ti-20Cr alloy displayed a micro-network structure. The aforementioned simulation exhibits a desirable combination of bioactivity, a low elastic modulus and low processing costs. Therefore this method of Ti-20Cr possesses promising applications for artificial bone substitutes or other hard tissue replacement materials that require heavy load-bearing properties.