Printing Bone Parts: A News Technological Advancement
This machine was said to be as big as an enormous refrigerator that can print out human skeletons in just overnight by using information that are fed into a rapid prototyping machine.
There are two main methods for building up a skeletal model – sintering and extrusion. Sintering is when the plastic threads are made which is like baking using powdered materials and then the extrusion method is done by the machine.
The plastic is fed into the machine like a thread fed into a loom. It is heated with a precise temperature and pressure so that it will melt at a right point. Enough to be deposited by the printer but not as much that it does not retain its shape.
Implants are normally made from titanium, which is currently the least reactive thing you can put in your body.
So this means an extra step from plastic model to titanium implant because the plastics have yet to prove themselves as biocompatible, but eventually, as more body-tolerated materials are developed, surgeons will be able to print out and stick in these synthetic implants.
And rapid prototyping means the surgeon is much better prepared before an operation begins. There is less time spent trying to customize the implant to the patient's skeleton and so operations takes a fraction of the time.
More of this story can be found at: http://www.radionetherlands.nl/features/science/060717rf


