플라즈마 전해 산화처리된 타이타늄의 표면개질 및 생체적합성에 미치는 양이온의 영향

Abstract

This study investigated the influence of phosphate electrolytes on surface characteristics and biological response of the titanium oxide layer formed via plasma electrolytic oxidation coating. For this purpose, the present coatings were carried out on the titanium samples with a current density of 200 mA/cm2 using two different electrolytes containing Na3PO4 and K3PO4, respectively. Microstructural observations revealed that the surface roughness of the titanium oxide layer formed in the K3PO4 electrolyte was higher than that in the Na3PO4 electrolyte since the fraction of the micro pores present in the titanium oxide layer formed in the K3PO4 electrolyte was higher than that in the Na3PO4 electrolyte whereas the size of the micro pore remained constant. From the mineralization study in the simulated body fluid solution, the precipitation and growth of Ca-apatite on the titanium oxide layer formed in the K3PO4 electrolyte was superior to that in the Na3PO4 electrolyte due to the enhanced surface roughness. In addition, in vitro cell adhesion was triggered in case of the titanium oxide layer formed in the K3PO4 electrolyte.