Fabrication and Mechanical Properties of Porous Ti/HA Composites for Bone Fixation Devices

Naoyuki Nomura; Kozue Sakamoto; Katsuya Takahashi; Seiji Kato; Yasunori Abe; Hisashi Doi; Yusuke Tsutsumi; Masahiro Kobayashi; Equo Kobayashi; Woo-Jong Kim; Kyo-Han Kim; Takao Hanawa

doi:10.2320/matertrans.M2010092

Naoyuki Nomura, Kozue Sakamoto, Katsuya Takahashi, Seiji Kato, Yasunori Abe, Hisashi Doi, Yusuke Tsutsumi, Masahiro Kobayashi, Equo Kobayashi, Woo-Jong Kim, Kyo-Han Kim, Takao Hanawa

Author information

Naoyuki Nomura
Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo Medical and Dental University
Kozue Sakamoto
Department of Life and Environmental Science, Faculty of Engineering, Chiba Institute of Technology
Katsuya Takahashi
Department of Life and Environmental Science, Faculty of Engineering, Chiba Institute of Technology
Seiji Kato
Department of Life and Environmental Science, Faculty of Engineering, Chiba Institute of Technology
Yasunori Abe
Faculty of Dentistry, Tokyo Medical and Dental University, Tokyo Medical and Dental University
Hisashi Doi
Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo Medical and Dental University
Yusuke Tsutsumi
Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo Medical and Dental University
Masahiro Kobayashi
Department of Life and Environmental Science, Faculty of Engineering, Chiba Institute of Technology
Equo Kobayashi
Department of Metallurgy and Ceramics Science, Graduate School of Engineering, Tokyo Institute of Technology
Woo-Jong Kim
Department of Dental Biomaterials, School of Dentistry, Kyungpook National University
Kyo-Han Kim
Department of Dental Biomaterials, School of Dentistry, Kyungpook National University
Takao Hanawa
Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo Medical and Dental University
Graduate School of Engineering, The University of Tokyo

Keywords: porous titanium compacts, hydroxylapatite (HA), composites, Young’s modulus

JOURNAL FREE ACCESS

2010 Volume 51 Issue 8 Pages 1449-1454

DOI https://doi.org/10.2320/matertrans.M2010092

View "Advance Publication" version (July 14, 2010).

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Abstract

Porous Ti (pTi)/hydroxylapatite (HA) composites were fabricated by an infiltration method in a vacuum and sintering. The Young’s modulus of the composites was evaluated before and after the immersion in Hanks’ solution. The strength of the composites was also evaluated by four-point bending test. The Young’s modulus of the compacts was governed by the porosity and was comparable to the human bone in the porosity range from 24 to 34%. The Young’s modulus of sintered pTi/HA composites was larger than that of pTi. The Young’s modulus of the sintered pTi/HA composites decreased after immersion in Hanks’ solution. The proof and bending strengths of the sintered pTi/HA composites were larger than those of pTi. Solid solution hardening of Ti by oxygen contributed the increase of the proof strength.

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