TY - JOUR
T1 - Micro-arc oxidation treatment to improve the hard-tissue compatibility of Ti-29Nb-13Ta-4.6Zr alloy
AU - Tsutsumi, Yusuke
AU - Niinomi, Mitsuo
AU - Nakai, Masaaki
AU - Tsutsumi, Harumi
AU - Doi, Hisashi
AU - Nomura, Naoyuki
AU - Hanawa, Takao
N1 - Funding Information:
This study was performed under the inter-university cooperative research program of the Institute for Materials Research, Tohoku University. This study was also supported by JSPS KAKENHI 21700486, Grant-in-Aid for Young Scientists (B).
PY - 2012/12/1
Y1 - 2012/12/1
N2 - Micro-arc oxidation (MAO) was performed on a β-type Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) in this study to improve its bioactivity in a body fluid and its hard-tissue compatibility. The surface oxide layer formed on TNTZ by MAO treatment in a mixture of calcium glycerophosphate and magnesium acetate was characterized using various surface analyses. The oxide layer was mainly composed of two types of TiO 2 (rutile and anatase), and it also contained Ca, P, and Mg, which were incorporated from the electrolyte during the treatment. The calcium phosphate formation on the surface of the specimens after immersion in Hanks' solution was evaluated to determine the bioactivity of TNTZ with and without MAO treatment. As a result, thick calcium phosphate layers formed on the TNTZ specimen that underwent MAO treatment, whereas only a small amount of precipitate was observed on TNTZ without treatment. Thus, the MAO treatment is a promising method to improve the bioactivity and hard-tissue compatibility of TNTZ.
AB - Micro-arc oxidation (MAO) was performed on a β-type Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) in this study to improve its bioactivity in a body fluid and its hard-tissue compatibility. The surface oxide layer formed on TNTZ by MAO treatment in a mixture of calcium glycerophosphate and magnesium acetate was characterized using various surface analyses. The oxide layer was mainly composed of two types of TiO 2 (rutile and anatase), and it also contained Ca, P, and Mg, which were incorporated from the electrolyte during the treatment. The calcium phosphate formation on the surface of the specimens after immersion in Hanks' solution was evaluated to determine the bioactivity of TNTZ with and without MAO treatment. As a result, thick calcium phosphate layers formed on the TNTZ specimen that underwent MAO treatment, whereas only a small amount of precipitate was observed on TNTZ without treatment. Thus, the MAO treatment is a promising method to improve the bioactivity and hard-tissue compatibility of TNTZ.
KW - Bioactivity
KW - Calcium phosphate
KW - Hard-tissue compatibility
KW - Micro-arc oxidation
KW - Titanium alloy
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U2 - 10.1016/j.apsusc.2012.01.024
DO - 10.1016/j.apsusc.2012.01.024
M3 - Article
AN - SCOPUS:84869084188
SN - 0169-4332
VL - 262
SP - 34
EP - 38
JO - Applied Surface Science
JF - Applied Surface Science
ER -