H
Hiroyasu Takeuchi
Researcher at Mitsubishi
Publications - 86
Citations - 1018
Hiroyasu Takeuchi is an academic researcher from Mitsubishi. The author has contributed to research in topics: Calcium & Cement. The author has an hindex of 15, co-authored 86 publications receiving 1006 citations. Previous affiliations of Hiroyasu Takeuchi include MITSUBISHI MATERIALS CORPORATION.
Papers
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Journal ArticleDOI
Four calcium phosphate ceramics as bone substitutes for non-weight-bearing
Toshiaki Kitsugi,Takao Yamamuro,Takashi Nakamura,Seiya Kotani,Tadashi Kokubo,Hiroyasu Takeuchi +5 more
TL;DR: It is shown that the apparent insignificance of strict calcium:phosphorus ratio with respect to the biological results greatly simplifies processing of calcium phosphate ceramics for clinical application.
Journal ArticleDOI
Mechanical strength of calcium phosphate cement in vivo and in vitro.
H. Yamamoto,Shigeo Niwa,M. Hori,Tomokazu Hattori,K. Sawai,S. Aoki,M. Hirano,Hiroyasu Takeuchi +7 more
TL;DR: The results suggest the clinical possibility of this calcium phosphate cement, which could be used as a material for enhancing implant fixation, which showed a greater mechanical strength than cement B.
Journal ArticleDOI
Bonding behavior between two bioactive ceramics in vivo.
Toshiaki Kitsugi,Takao Yamamuro,Takashi Nakamura,Tadashi Kokubo,Masataka Takagi,Takehiro Shibuya,Hiroyasu Takeuchi,Mikiya Ono +7 more
TL;DR: Results suggest that self-repair of bioactive ceramic is possible under certain conditions and might be caused by the chemical change of hydroxyapatite occurring at different sintering temperatures.
Patent
Method for filling in defects or hollow portions of bones
Shigeo Niwa,Kazuhiko Sawai,Shinobu Takahashi,Hideo Tagai,Mikiya Ono,Yoshiaki Fukuda,Hiroyasu Takeuchi +6 more
TL;DR: A filler for filling in defects or hollow portions of bones to coalesce with the bone tissues is provided which comprises powders of a calcium phosphate compound having the apatite crystalline structure of each crystal grain size of from 50 ∪ to 10 microns as mentioned in this paper.
Patent
Calcium phosphate granular cement and method for producing same
TL;DR: A calcium phosphate granular cement contains mixed powders obtained by mixing α-type calcium tertiary phosphate or calcium quaternary phosphate with a calcium phosphate compound selected from calcium primary phosphate, calcium secondary phosphate and mixtures thereof at a Ca/P molar ratio of 1.30 to 1.90 as discussed by the authors.