ELECTROCHEMICAL SURFACE TREATMENT METHOD OF IMPLANTS COMPRISING METALLIC TITANIUM OR TITANIUM ALLOYS

摘要

PURPOSE: A surface treatment method of forming a porous oxide coating film having superior biocompatibility with bone, chemical and physical stabilities, uniformed pore distribution, expanded pore size and smooth surface characteristics on the surface of implants comprising metallic titanium or titanium alloys is provided. CONSTITUTION: The electrochemical surface treatment method of implants comprising metallic titanium or titanium alloys comprises the processes of pre-treating the surface of implants comprising metallic titanium or titanium alloys; forming an oxide coating film on the surface of the implants by electrochemically oxidizing the pre-treated implants; and post-treating the formed oxide coating film with an acid or alkaline aqueous solution to obtain uniformed pore distribution, wherein the pre-treatment process comprises the steps of degreasing the implants using acetone or alcohol; water washing the implants taken out of the aqueous solution by taking the implants out of the aqueous solution after dipping the degreased implants into a NaOH aqueous solution or KOH aqueous solution having a concentration of 30 g/liter at 80 deg.C for 5 minutes, pickling the water washed implants in a solution comprising 15 mL of concentrate nitric acid having a concentration of 61 wt.%, 3 mL of hydrofluoric acid having a concentration of 49 wt.% and 82 mL of distilled water at an ordinary temperature for 5 minutes, and washing the implants with distilled water for 10 minutes.