Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7869933 | Materials Science and Engineering: C | 2014 | 7 Pages |
Abstract
Effect of high-pressure torsion (HPT) deformation on biocompatibility and surface chemistry of TiNi was systematically investigated. Ti-50Â mol% Ni was subjected to HPT straining for different numbers of turns, NÂ =Â 0.25, 0.5, 1, 5 and 10 at a rotation speed of 1Â rpm. X-ray photoelectron spectroscopy observations after 7Â days of cell culture revealed the changes in the surface oxide composition, enrichment of Ti and detection of nitrogen derived from organic molecules in the culture medium. Plating efficiency of L929 cells was slightly increased by HPT deformation though no significant difference was observed. Albumin adsorption was higher in HPT-deformed samples, while vitronectin adsorption was peaked at NÂ =Â 1. HPT deformation was also found to effectively suppress the Ni ion release from the TiNi samples into the cell culture medium even after the low degree of deformation at NÂ =Â 0.25.
Related Topics
Physical Sciences and Engineering
Materials Science
Biomaterials
Authors
Dayangku Noorfazidah Awang Shri, Koichi Tsuchiya, Akiko Yamamoto,