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Title: Fabrication of bioactive titanium and its alloys by combination of doubled sandblasting process and alkaline simulated body fluid treatment
Authors: Yabutsuka, Takeshi  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-2111-7470 (unconfirmed)
Mizuno, Hiroshi
Takai, Shigeomi  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-9067-0806 (unconfirmed)
Author's alias: 薮塚, 武史
高井, 茂臣
Keywords: Titanium
Titanium alloys
Apatite nucleation
Alkaline SBF treatment
Doubled sandblasting process
Issue Date: 1-Oct-2019
Publisher: Ceramic Society of Japan
Journal title: Journal of the Ceramic Society of Japan
Volume: 127
Issue: 10
Start page: 669
End page: 677
Abstract: In this study, we aimed to improve apatite-forming ability of titanium (Ti) and its alloys, Ti–15Mo–5Zr–3Al, Ti–12Ta–9Nb–6Zr–3V–O, Ti–6Al–4V, and Ti–22V–4Al. The surfaces of Ti and its alloys were treated by the doubled sandblasting process using ceramic grinding particles with 14.0 and 3.0 µm for average particle size. The Ti and its alloys were immersed in the alkaline simulated body fluid (SBF) which was adjusted at higher pH than that in the physiological SBF and were heated in the alkaline SBF by electromagnetic induction. By this treatment, apatite nucleation was promoted near the surface of the substrates and apatite nuclei were precipitated in the pores of the substrates. By immersing in the physiological SBF to test apatite-forming ability, hydroxyapatite was covered the entire surfaces of the Ti and its alloys within 1 day and high apatite-forming ability was shown. The doubled sandblasting process firstly using larger grinding particles and secondly using smaller ones was most effective to increase the surface roughness of the substrates. Average adhesive strength of the hydroxyapatite layer formed in the physiological SBF increased, which depended on the increase of the surface roughness. These results indicated that sandblasting condition was an important factor to improve mechanical interlocking effect related to the increase of the surface roughness and that the doubled sandblasting process had a possibility to be one of the candidates of the treatment to solve this problem.
Rights: ©2019 The Ceramic Society of Japan This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by-nd/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
URI: http://hdl.handle.net/2433/245927
DOI(Published Version): 10.2109/jcersj2.19081
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