Microspherical sintered bodies of hydroxyapatite are prepared according to a new specific process wherein a suspension having hydroxyapatite microparticles dispersed in water or an organic solvent or a mixture of water and an organic solvent compatible therewith is atomized into a heating zone maintained above 500° C. whereby spherical agglomerates of hydroxyapatite microparticles formed by drying and {TAIL ~ solidification} of microdroplets of {HEAD ~ the suspension} are sintered while the agglomerates are suspended in the heating zone 
Microspherical sintered bodies of hydroxyapatite are prepared according to a new specific process wherein a suspension having hydroxyapatite microparticles dispersed in water or an organic solvent or a mixture of water and an organic solvent compatible therewith is atomized into a heating zone maintained above 500 ° C. whereby spherical agglomerates of hydroxyapatite microparticles formed by drying and { TAIL ~ solidification } of microdroplets of { HEAD ~ the suspension } are sintered while the agglomerates are suspended in the heating zone
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