Study of the surface characteristics of magnetron‐sputter calcium phosphate coatings

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<jats:title>Abstract</jats:title><jats:p>Plasma‐sprayed hydroxylapatite coatings on metals such as titanium have been investigated for many years and have shown a good biocompatibility when implanted in bony tissues. Radiofrequency magnetron sputtering was used as an alternative method to deposit thin films of hydroxylapatite on titanium substrates. X‐ray diffraction demonstrated that the sputtered layer was crystalline with a preferred (<jats:italic>001</jats:italic>) crystallographic orientation with the C‐axis perpendicular to the substrate surface. Scanning electron microscopy showed that the deposited films had a uniform and dense structure. The calcium phosphate ratio varied between 1.5 and 2.0, as determined by energy‐dispersive X‐ray analysis. The <jats:italic>in vitro</jats:italic> dissolution appeared to be determined by the degree of the coating's crystallinity. © 1994 John Wiley & Sons, Inc.</jats:p>

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