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Deposition methods of microstructure and nanostructure coatings on metal bone implants: a review

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Document pages: 9 pages

Abstract: This paper reviews the deposition process of metal bone implants and its relationship with bone integration. The purpose is to summarize the different deposition processes of microstructure and nanostructure bone conductive coatings on metal bone implants. The surface morphology of implant for optimal bone integration was introduced. The five most widely used deposition processes of bone conductive coatings are reviewed from the aspects of microstructure and nanostructure, available thickness and cost, all of which are summarized in tables and charts. Plasma spraying technology provides cost-effective coatings, but there are defects in bone integration, such as high-density, amorphous coatings. Electrodeposition and aerosol deposition technologys facilitate the development of a controlled-microstructure coating at a similar cost. Nanoscale physical vapor deposition and chemical vapor deposition offer an alternative approach by allowing the coating of a highly structured surface without significantly affecting the microstructure. Various biomedical studies on each deposition process are reviewed along with applicable results. Suggested directions for future research include further optimization of the process-microstructure relation, crystalline plasma spray coatings, and the deposition of discrete coatings by additive manufacturing.

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