PMID: 15348238Sep 7, 2004Paper

Effect of thermal treatment on apatite-forming ability of NaOH-treated tantalum metal

Journal of Materials Science. Materials in Medicine
T MiyazakiT Nakamura

Abstract

The prerequisite for an artificial material to bond to living bone is the formation of bonelike apatite on its surface in the body. This apatite can be reproduced on its surface even in an acellular simulated body fluid with ion concentrations nearly equal to those of the human blood plasma. The present authors previously showed that the tantalum metal subjected to a NaOH treatment to form a sodium tantalate hydrogel layer on its surface forms the bonelike apatite on its surface in SBF in a short period. The gel layer as-formed on the metal is, however, not resistant against abrasion, and hence thus-treated metal is not useful for clinical applications. In the present study, effects of thermal treatment on the mechanical properties and apatite-forming ability of the NaOH-treated tantalum metal were investigated. The sodium tantalate gel on the NaOH-treated tantalum was dehydrated to convert into amorphous sodium tantalate by a thermal treatment at 300 degrees C in air environment and into crystalline sodium tantalates by the thermal treatment at 500 degrees C. Resistivity of the gel layer against both peeling-off and scratching was significantly improved by the thermal treatment at 300 degrees C. The high apatite-forming abilit...Continue Reading

Citations

Feb 29, 2008·Journal of Biomedical Materials Research. Part a·Qiyi ZhangJiyong Chen
Apr 22, 2015·The Open Biomedical Engineering Journal·Tadashi Kokubo, Seiji Yamaguchi
Mar 27, 2012·Journal of Biomedical Materials Research. Part a·Amir OronAnat Stein
Aug 1, 2008·Journal of the Royal Society, Interface·M NavarroJ A Planell

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