Open AccessPositively charged bioactive Ti metal prepared by simple chemical and heat treatments
Author(s) -
Tadashi Kokubo,
Deepak K. Pattanayak,
Seiji Yamaguchi,
Hiroaki Takadama,
Tomiharu Matsushita,
Toshiyuki Kawai,
Mitsuru Takemoto,
Shunsuke Fujibayashi,
Takashi Nakamura
Publication year - 2010
Publication title -
journal of the royal society interface
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.655
H-Index - 139
eISSN - 1742-5689
pISSN - 1742-5662
DOI - 10.1098/rsif.2010.0129.focus
Subject(s) - apatite , titanium , metal , titanium hydride , rutile , materials science , oxide , adsorption , chemical engineering , hydride , surface modification , inorganic chemistry , chemical bond , metallurgy , chemistry , organic chemistry , engineering
A highly bioactive bone-bonding Ti metal was obtained when Ti metal was simply heat-treated after a common acid treatment. This bone-bonding property was ascribed to the formation of apatite on the Ti metal in a body environment. The formation of apatite on the Ti metal was induced neither by its surface roughness nor by the rutile phase precipitated on its surface, but by its positively charged surface. The surface of the Ti metal was positively charged because acid groups were adsorbed on titanium hydride formed on the Ti metal by the acid treatment, and remained even after the titanium hydride was transformed into titanium oxide by the subsequent heat treatment. These results provide a new principle based on a positively charged surface for obtaining bioactive materials.
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