The Effect of Multiple Surface Treatments on Biological Properties of Ti-6Al-4V Alloy
- PDF / 1,340,643 Bytes
- 6 Pages / 593.972 x 792 pts Page_size
- 3 Downloads / 187 Views
RODUCTION
LASER treatment is one of the recently developed processes used to modify surface structure and properties of implant components. Such treatments are used in implant fixation which is categorized into three main routes, i.e., mechanical fixation, direct chemical bonding, and biological fixation.[1,2] Recent investigations[1] have shown that the first two techniques may cause biological problems thus current research activities are focused on biological fixation. In this method, the possibility of osseointegration is enhanced by increasing roughness and surface porosity of the component.[2] A variety of mechanical, chemical, and physical treatments have been employed for achieving the desired surface conditions. The main parameters of interest include the bioactivity (i.e., osseointegration for bone implants) and biocompatibility (i.e., non-toxicity in contact with human internal tissues) characteristics of the product, the surface finish quality, the ease of performance and decisively, the process costs.[1,2] A desirable combination of these parameters is usually hard to achieve and a wide range of surface procedures invented in the literature have faced numerous problems for industrialization. Recent investigations are focused on a combination of mechanical, chemical, and physical treatments to achieve the desired properties. It is now well established that the individual FARHANG PARSIKIA, Graduated M.Sc., and SIROUS ASGARI, Associate Professor, are with the Department of Materials Science and Engineering, Sharif University of Technology, 11365-9466 Tehran, Iran. Contact e-mail: [email protected] PUPAK AMINI, Student, formerly with the Department of Materials Science and Engineering, Sharif University of Technology, is now with the Department of Biomechanical Engineering, Sharif University of Technology. Manuscript submitted November 15, 2013. METALLURGICAL AND MATERIALS TRANSACTIONS A
process parameters and even the process sequence may significantly affect the final properties of implants.[3,4] Each particular treatment route may cause a characteristic microstructural and physicochemical change to the treated surface. Chemical treatments including anodizing, acid and alkali treatments were the pioneering routes employed for surface modification of bone implants.[2] A number of researchers have studied the effects of these treatments on biological properties of titanium and its alloys.[3–5] In case of anodizing, however, there are unknown aspects of the process such as the effect of prior treatment on oxidation intensity. This treatment has a fine scale influence on surface microstructure and has been regularly employed as a final stage in surface treatment of implant components.[3] Also, various ranges of mechanical and physical processes may be used for surface modification of implants.[3] Blasting processes such as grit blasting and shot peening are the most widely used mechanical procedures in implant industry.[4] Among physical processes, laser roughening is one of the advanced procedures with a wide range of mod
Data Loading...
