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  • Title: Biocompatibility of a functionally graded bioceramic coating made by wide-band laser cladding.
    Author: Weidong Z, Qibin L, Min Z, Xudong W.
    Journal: J Biomed Mater Res A; 2008 Nov; 87(2):429-33. PubMed ID: 18186063.
    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 beta-tricalcium phosphate and hydroxyapatite, showed favorable biocompatibility with the bone tissue and promoted in vivo osteogenesis.
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