ISSN 0004-881X

Injectable Apatitic Calcium Phosphate Cements and Microporous Biphasic Calcium Phosphate Granules Complex for Bone Repair

by K. Ozeki ^1,2, H. Aoki ³, and T. Masuzawa ¹

1) Department of Mechanical Engineering, Ibaraki University, Japan
2) Frontier Research Center for Applied Atomic Sciences, Ibaraki University, Japan
3) International Apatite Co., Ltd. , Japan

Abstract

Hydroxyapatite (HA) was coated onto a titanium substrate using radio frequency magnetron sputtering. The sputtered film was crystallized by a hydrothermal treatment. The as-sputtered film and the hydrothermally treated film were observed using a canning transmission electron microscopy (STEM) equipped with energy dispersive X-ray spectroscopy (EDX). In the cross-sectional observation of the HA-Ti interface, the HA layer was crystallized after the hydrothermal treatment, and the HA crystallization proceeded to near the titanium surface. In the EDX analysis, the mixing layer of HA and Ti was observed at the HA-Ti interface of the as-sputtered film, and the titanium oxide layer was not observed. However, in the hydrothermally treated film, the titanium oxide layer was observed at the interface. The formation of titanium oxide at the HA-Ti interface would contribute to the adhesion improvement of the sputtered film following the hydrothermal treatment.

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