The excellent biocompatibility of titanium is achieved by a stable and corrosion-resistant oxide layer. The crystal structure and thickness of the oxide layer have different influences on cell behavior, especially protein adsorption and blood compatibility. In order to improve the integration of implants, the interfacial reaction must be controlled to minimize the nonspecific adsorption of proteins and promote tissue healing phenomena. Thus, our goal was to develop a new method to functionalize the implant surface by glow discharge. First, argon plasma was used to remove all chemical traces such as adsorbed contaminants and impurities on the titanium surfaces, and subsequently oxidation by oxygen plasmas with ion bombardment resulted in a dense oxide layer. According to the physical and chemical properties detected and analyzed, results revealed that the plasma-treatment power was proportionally related to the oxide layer thickness at specific working times. The ability to resist corrosion was dependent on the oxide thickness. Surface wettability was measured by the contact angle analysis. It revealed that the longer time the titanium was treated, the better hydrophilic properties that resulted. Analyses by grazing incidence x-ray diffractometry (GIXRD) and transmission electron microscopy (TEM) showed that an amorphous-like titanium surface with a rutile-phase nano-TiO2 structure existed. Based on these results, the oxide layer thickness increased after plasma treatment, and the crystal structure is a nanostructural rutile TiO2 phase that can increase specific protein adsorption and enhance hemocompatibility. It is believed that nanostructural titanium oxide films can improve tissue healing and promote subsequent osseointegration.
|Translated title of the contribution||Microstructure and Properties of a Nanostructural TiO2 Layer on the plasma-treated Titanium Implant|
|Original language||Chinese (Traditional)|
|Number of pages||8|
|Publication status||Published - 2005|
- blood compatibility
- corrosion resistance