Researchers at the University of Tokyo Hospital have joined with a venture company to develop a system that uses 3D inkjet printers to generate artificial bones for facial reconstructive surgery.

To make an artificial bone with this technology, a 3D computer model of the bone is first created based on the patient’s X-ray and CT scan data. The computer model is then sliced into a large number of cross-sections and the data is sent to a special 3D inkjet printer, which works sort of like an ordinary inkjet printer by transferring tiny droplets of liquid onto a surface. However, unlike ordinary printers that print on paper, this one prints onto thin layers of powdered alpha-tricalcium phosphate (alpha-TCP). The “ink” is a water-based polymer adhesive that hardens the alpha-TCP it comes into contact with. By repeatedly laying down the powder and printing successive layers on top of one another, the printer is able to physically reproduce the desired bone to an accuracy of one millimeter.

Strong, lightweight and porous, the printed bones have characteristics similar to natural bone, and because they are tailored to fit exactly where they need to go, they are quick to integrate with the surrounding bone. The printed bone is also designed to be resorbed by the body as the surrounding bone slowly grows into it and replaces it.

The team hopes to commercialize the technology by 2010.

Via Pink Tentacle