Patent ID: 6974532
Filing Date: 2005-12-13
Classification: A61C,A61L

Abstract:
1. A method for forming a highly adherent coating of a desired calcium phosphate phase on a titanium-based substrate for use as an orthopedic or dental implant, comprising: electrochemically depositing the coating of said calcium phosphate phase onto said substrate from a metastable calcium phosphate electrolyte solution using a modulated electrical potential under pH, temperature and electrolyte composition and concentration conditions favorable for forming the desired calcium phosphate phase; said deposition temperature range being from room temperature to 95° C.; said pH being in the range of 4 to 12; said modulated electrical potential providing plating current pulse time based on square pulses being in the range of from about 200 μsec to 20 sec and the ON/OFF ratio being in the range of 10:1 to 1:100, and plating current density being in the range of 200 μa/cm said substrate surface prior to said electrochemical deposition is prepared by a surface preparation treatment selected from the group consisting of (1) grit blasting with an apatitic abrasive, (2) arc-deposition of titanium; (3) chemically texturing; and (4) coating with Co—Cr beads.