Fabrication of Titanium Nitride/Apatite Functionally Graded Implants by Spark Plasma Sintering

Hideomi Kondo; Atsuro Yokoyama; Mamoru Omori; Akira Ohkubo; Toshio Hirai; Fumio Watari; Motohiro Uo; Takao Kawasaki

doi:10.2320/matertrans.45.3156

Hideomi Kondo, Atsuro Yokoyama, Mamoru Omori, Akira Ohkubo, Toshio Hirai, Fumio Watari, Motohiro Uo, Takao Kawasaki

Author information

Hideomi Kondo
Removable Prosthodontics and Stomatognathostatic Rehabilitation, Department of Oral Functional Science, Graduate School of Dental Medicine, Hokkaido University
Atsuro Yokoyama
Removable Prosthodontics and Stomatognathostatic Rehabilitation, Department of Oral Functional Science, Graduate School of Dental Medicine, Hokkaido University
Mamoru Omori
Institute for Materials Research, Tohoku University
Akira Ohkubo
Institute for Materials Research, Tohoku University
Toshio Hirai
Japan Fine Ceramics Center
Fumio Watari
Dental Materials and Engineering, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University
Motohiro Uo
Dental Materials and Engineering, Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University
Takao Kawasaki
Removable Prosthodontics and Stomatognathostatic Rehabilitation, Department of Oral Functional Science, Graduate School of Dental Medicine, Hokkaido University

Keywords: titanium nitride, hydroxyapatite, functionally graded materials, spark plasma sintering, implant, biocompatibility

JOURNAL FREE ACCESS

2004 Volume 45 Issue 11 Pages 3156-3162

DOI https://doi.org/10.2320/matertrans.45.3156

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Abstract

Titanium nitride/hydroxyapatite functionally graded implant (TiN/HAP) was successfully fabricated by spark plasma sintering method (SPS) and their properties were investigated. The functionally graded materials (FGM) with the concentration from TiN at one end to HAP at the other were prepared by sintering at 1100 and 1200°C under the pressure of 150 MPa. The Brinell hardness was around H_B 60, nearly uniform for the whole range of composition. After 2 and 8 week implantation in diaphysis of femur of rat, there was very little inflammation and the new bone was formed around the sample. By use of TiN instead of Ti, the decomposition of HAP during sintering process could be suppressed and the successful sintering of FGM and mechanical properties could be attained.

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