J. Technology and Education, Vol.17, no.1, pp.1-5, 2010

研究論文

邪魔棒式濾過法を用いたヒドロキシアパタイト−アルミナ系人工歯根の創製

　

下野 晃^*，岩田 政司

　

鈴鹿工業高等専門学校　生物応用化学科　（〒514−0294　三重県鈴鹿市白子町）

　　　　　　　　　　　　　^*shimono@chem.suzuka-ct.ac.jp

　

Invention of an Artificial Hydroxyapatite-Alumina Implant

Using a Rod-Occlusion Filtration Method

　

Akira SHIMONO^＊ and Masashi IWATA

　

Department of Chemistry and Biochemistry, Suzuka National College of Tchnology,

(Shiroko-cyo, Suzuka-shi, Mie 510-0294,Japan)

　

(Received January 5, 2010; Accepted February 8, 2010)

　

　　　　　　　　　　　　　　　　　　　　Abstract

The production of alumina composite materials was evaluated as a method for strengthening hydroxyapatite （HA）． An original occlusion rod filtration method was used to produce test bodies. Alumina and HA slurries were used as starting materials and were layered to produce a cake． After compression molding, using a hydraulic press, thermal treatment was carried out．By this means, an artificial root model was developed in which the center shaft and crown mounting parts were formed from an alumina composition, while the parts to be embedded in the alveolar bone were formed from a porous HA composition (pore diameter, 90-150 μm)． The Vickers hardness of the HA and alumina regions in test bodies subjected to sintering conditions of 1473 K were 230 and 1060 VHN, respectively, and the compressive strength was 85.7 MPa． However, when the HIP treatment was carried out for 1h at 1473 K and 122 MPa, the Vickers hardness improved to 280 and 1360 VHN, respectively, and the compressive strength improved to 174.7 MPa．

　

Key-words：Hydroxyapatite, Implant, HIP treatment Vickers hardness