Trial Formation of Artificial Bone by Inkjet Powder-Layered Manufacturing
Kenji Yamazawa* , Masahiro Anzai* , Hideo Yokota** , Ryutaro Himeno**, Hiroshi Suzuki*** , Hiroyuki Narahara*** , and Shigeki Suzuki****
* Advanced Engineering Team, Advanced Development and Supporting Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
** Computational Biomechanics Unit, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
*** Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, 680-4 Kawazu, Iizuka-shi, Fukuoka, 820-8502, Japan
**** NEXT21 K.K., 3-38-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
Artificial bone implants are in relatively simple shapes for use mainly by cutting or manually. To produce a desired bone shape, we used tribasic calcium phosphate bone ash powder as the material and aqueous sodium chondroitin sulfate solution as the binder in inkjet powder-layered manufacturing. In experiments, we reproduced a rabbit femur with a precision of 0.6 mm and a minimum longitudinal hollow shaft 2 mm in diameter based on computed tomography data. We gave the brittle artificial bone a compressive strength of 3 MPa by dipping it in water and binder through its hydrate reaction.