Journal of Biomedical Materials Research · 1994 · 237 citations · 17 references
Natural SciencesMaterials EngineeringMaterials ScienceBiocompatibilityBiomaterialsBone GraftingBioceramicsCalcium Phosphate BiomaterialsCalcium Phosphate MaterialsCoatingsImplant MaterialsImplantable BiomaterialsBioceramic CoatingsCalcium Phosphate CoatingsCalcium-phosphate DepositionCrystallographic OrientationCrystallographic Preferred OrientationSurface Coatings For ImplantsSurface Crystallographic OrientationTitanium Biocompatibility
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 (001) 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 in vitro dissolution appeared to be determined by the degree of the coating's crystallinity.
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