Effects of various surface treatments for titanium on surface micro roughness, static wettability, fibronectin adsorption

Shin, Hwa Sub; Kim, Young Su; Shin, Sang Wan

Abstract

Purpose: This study aims to get the fundamental data which is necessary to the development direction of implant surface treatment hereafter, based on the understanding the surface structure and properties of titanium which is suitable for the absorption of initial tissue fluid by researching effects of additional surface treatments for sandblasted with large grit and acid-etched(SLA) titanium on surface micro-roughness, static wettability, fibronectin adsorption. Materials and Method: In the Control groups, the commercial pure titanium disks which is 10mm in diameter and 2mm in thickness were treated with HCI after sandblasting with 50micrometer Al2O3. The experiment groups were made an experiment each by being treated with 1) 22.5% nitric acid according to SLA+ASTM F86 protocol, 2) SLA+30% peroxide, 3) SLA+NaOH, 4) SLA+Oxalic acid, and 5) SLA+600degree C heating. In each group, the value of Ra and RMS which are the gauges of surface roughness was measured, surface wettability was measured by analyzing with Sessile drop method, and fibronectin adsorption was measured with immunological assay. The significance of each group was verified by (SPSS, ver.10.0 SPSS Inc.) Kruskal-Wallis Test.(alpha=0.05) And the correlation significance between Surface micro-roughness and surface wettability, surface roughness and fibronectin adsorption, and surface wettability and fibronectin adsorption was tested by Spearman's correlation analysis. Result: All measure groups showed the significant differences in surface micro-roughness, surface wettability, and fibronectin adsorption.(p<0.05) There was no significance in correlation among the surface micro-roughness, surface wettability, and fibronectin adsorption.(p>0.05)
Conclusion
Surface micro-roughness and surface wettability rarely affected the absorption of initial tissue fluid on the surface of titanium.