Mitsuo Niinomi

Mitsuo Niinomi (1951, Japan)

Director of Institute for Materials Research, Tohoku University, Japan

1973 BS (Dept. of Metallurgical Eng., Nagoya Univ.)
1975 MSc (Nagoya Univ., Dept. of Metallurgical Eng., Steel and Iron Eng)
1979 PhD (Nagoya Univ., Dept. of Metallurgical Eng., Steel and Iron Eng.)
1980-1989 Res. Associate, Dept. of Production Systems Eng., Toyohashi Univ. of Technology
1989-1995 Associate Professor
1995-Sept. 2005 Professor, Dept. of Production Systems Eng., Toyohashi Univ. of Technology
2003 Dental Dr. of Science (Aichi-Gakuin University)
Oct. 2005- Professor, Dept. of Biomaterials Sci., Inst. for Materials Research, Tohoku Univ.

1988-1989: Visiting Associate Professor, Carnegie-Mellon University (USA)
July 1997-December 1997: Visiting Professor, The University of Dayton (USA)
Foreign Researcher: Material Institute, Wright Patterson Air Force Base, US Air Force
1999-2002&2003-2005: Professor, Future Technology Center, Toyohashi Univ. of Technology
2000-2001: Visiting Researcher, Sizuoka Research Inst. and Hamamatus Research Inst.
2002: Lecturer (part-time) Tokyo Univ., Nagoya Inst. of Techn., Kyushu Inst. of Techn.
2005-2006: Visiting Prof. and Lecturer (part time) with Toyohashi Univ. of Technology
2005-2006: Lecturer (part-time) with Nagoya Univ.
2005-: Specialist with Pharmaceuticals and Medical Devices Agency
2006-2014: Cooperate Member of Science Council of Japan
April 2008-November 2009: Specially Appointed Assistant for President, Tohoku Univ.

Awards:
1986 Nagai Academic Award (Nagai Foundation)
1986 Best Technical Paper Award (Japan Institute of light Metals)
1986 Technical Award (Nikkan Kogyo Sinbun)
1994 Nishiyama Memorial Award (Iron and Steel Institute of Japan)
1993 Best Technical Paper Award (Japan Institute of Light Metals)
1993 Technical Award (Nikkan Kogyou Sinbun)
2000 Technical Award (Japan Titanium Association)
2002 Metals Technical Development Award (Japan Institute of Metals)
2003 Best Poster Presentation Award (JSME/ASME Int. Conf. on Materials and Processing)
2003 Best Technical Paper Award (Japan Institute of Metals)
2003 Nishio Civil Praise (Nishio-city)
2004 Best Technical Paper Award (Japan Institute of Metals)
2005 Award for Distinguished Contribution (Japan Institute of Light Metals
2005 Metals Technical Development Award (Japan Institute of Metals)
2006 Kobayashi Award (Technical Paper Award) (Japan Foundry Engineering Soc.)
2007 Metals Best Poster Award(Japan Institute of Metals)
2007 Best Poster Awards (for 2 posters) The 11th World Conference on Titanium, Kyoto,
2008 Lee Hsun Lecture Award (Inst. for Metals Research, Chinese Academy of Science)
2008 Metals Best Poster Award (Japan Institute of Metals)
2009 Metals Distinguished Contribution Award (Japan Institute of Metals)
2009 Metals Best Poster Award (Japan Institute of Metals)
2009 Best Paper Presentation Award (The Japanese Society for Dental Materials & Devices)
2009 Tanikawa-Harris Award (The Japan Institute of Metals)

Recent Development of High Mechanical Bio-functional Metallic Biomaterials

Mitsuo Niinomi, Toshikazu Akahori, Masaaki Nakai and Harumi Tsutsumi

Department of Biomaterials Science, Institute for Materials Research,

Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan

Abstract:

In order to inhibit the stress shielding between implant and bone, low modulus metallic biomaterials whose Young’s moduli are similar to that of bone are highly required. Therefore, within a decade, a lot of beta-type titanium alloys have been developed for biomedical applications because Young’s moduli of beta-type titanium are much lower than those of alpha- and (alpha-beta)-type titanium alloys. Low Young’s modulus of implants for substituting failed hard tissue such as artificial hip joints, bone plates and screws, and artificial dental roots inhibits stress shielding between implant and bone, and enhances bone remodeling. The Young’s modulus of beta-type titanium alloys developed for biomedical applications lies between approximately 40 GPa through 100 GPa. In general, the approximate average Young’s modulus of them seems to be around 80 GPa, which is still much greater than that of the cortical bone whose Young’s modulus is 10-30 GPa. Therefore, much lower Young’s modulus is required for titanium and its alloys. The recent development of lowering Young’s modulus of beta-type titanium alloys is mainly discussed in this paper.