Nanostructured coatings, hydroxyapatit

L. (2014) Fabrication, characterization and in.vitro evaluation of nanostructured zirconia/hydroxyapatite composite films on zirconium. Surf. Coat. Technol., 238, 58-67. 

Han, Y. et al. Evaluation of nanostructured carbonated hydroxyapatite coatings formed by a hybrid process of plasma spraying and hydrothermal synthesis. /. Biomed. Mater. Res., 2002,60 511-16. 

Huang, J., and Li, H. (2014) Hydroxyapatite/graphene-nanosheet composite coatings deposited by vacuum cold spray for biomedical applications inherited nanostructure and enhanced properties. Carbon, 67, 250-259. 

Rojaee R, Fathi M, Raeissi K. Electrophoretic deposition of nanostructured hydroxyapatite coating on AZ91 magnesium alloy implants with different surface treatments. Appl Surf Sci 2013 285 664-73. 

Dental implants and prosthetics alone account for a substantial proportion of the dental industry. It is therefore of no surprise that researchers focus heavily on this avenue. In contrast to other industries, dental industry nanocoatings do not perpetually involve the deposition of thin nanolayers onto a substrate. Often they can refer to the incorporation of nanostructured materials or particles into coatings on contact surfaces. For instance, a recent piece of work examined the usage of nanostructured hydroxyapatite (HA) as a filler material for root canal. HA (a commonly used material in coating implants to aid cell proliferation) particles sized at approximately 26 mn were incorporated into root canal sealer at variable ratios. At high concentrations, there was little difference in film thickness (implying they would meet ISO standards for root canal sealers). The observed improvements suggested that nanostructured HA could be used to formulate more stable tooth material interfaces [40]. 

Sutmeneva MA, et al. Effect of silicate doping on the structure and mechanical properties of thin nanostructured RF magnetron sputter-deposited hydroxyapatite films. Surf Coat Technol 2015 275 176-84. 

Zongtao Zhang, Matthew F. Dunn, Xiao, T.D., Antoni P. Tomsia, and Saiz, E. Nanostructured hydroxyapatite coatings for improved adhesion and corrosion resistance for medical implants. Proc. Mater. Res. Soc. Symp. 703 Nanophase and Nanocomposite Mater. IV, 2002, pp. 291-296. 

Chen, R, et al., 2006. Biocompatibility of electrophoretical deposition of nanostructured hydroxyapatite coating on roughen titanium surface in vitro evaluation using mesenchymal stem ceUs. Journal of Biomedical Materials Research Part B 82,183-191. 

Iskandar, M.E., Aslani, A., Liu, H., 2013. The effects of nanostructured hydroxyapatite coating on the hiodegradation and cytocompatihihty of magnesium implants. Journal of Biomedical Materials Research Part A 101 (8), 2340-2354. 

Johnson, I., Akari, K., Liu, H., 2013. Nanostructured hydroxyapatite/poly (lactic-co-glycolic acid) composite coating for controUing magnesium degradation in simulated body fluid. Nanotechnology 24, 375103. 

This chapter presents the current trends in this area with emphasis on load-bearing orthopaedic and dental implants. A detailed account on the general and the localized corrosion of conventional metalhc implants is provided. Novel fabrication strategies of nanostructured hydroxyapatite-based coatings and their roles as barrier coatings are presented. Impacts of nanoscale surface modifications on the corrosion resistance of permanent implants and novel bioresorbable implants based on magnesium alloys are highhghted. 

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