Biocompatibility of a functionally graded bioceramic coating made by wide-band laser cladding

✍ Scribed by Zhu Weidong; Liu Qibin; Zheng Min; Wang Xudong

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 251 KB
• Volume: 87A
• Category: Article
• ISSN: 1549-3296
• DOI: 10.1002/jbm.a.31774

✦ Synopsis

Abstract

The application of plasma spray is the most popular method by which a metal‐bioceramic surface composite can be prepared for the repair of biological hard‐tissue, but this method has disadvantages. These disadvantages include poor coating‐to‐substrate adhesion, low mechanical strength, and brittleness of the coating. In the investigation described in this article, a gradient bioceramic coating was prepared on a Ti‐6Al‐4V titanium alloy surface using a gradient composite design and wide‐band laser cladding techniques. Using a trilayer‐structure composed of a substratum, an alloy and bioceramics, the coating was chemically and metallurgically bonded with the substratum. The coating, which contains β‐tricalcium phosphate and hydroxyapatite, showed favorable biocompatibility with the bone tissue and promoted in vivo osteogenesis. © 2008 Wiley Periodicals, Inc. J Biomed Mater Res, 2008