|To: axial who wrote (40439)||2/6/2012 7:02:57 PM|
|From: axial||3 Recommendations  Respond to of 44141|
|Transplant jaw made by 3D printer claimed as first|
' The implant is a complex part - involving articulated joints, cavities to promote muscle attachment and grooves to direct the regrowth of nerves and veins. However, once designed, it only took a few hours to print.
"Once we received the 3D digital design, the part was split up automatically into 2D layers and then we sent those cross sections to the printing machine," Ruben Wauthle, LayerWise's medical applications engineer, told the BBC. "It used a laser beam to melt successive thin layers of titanium powder together to build the part. This was repeated with each cross section melted to the previous layer. It took 33 layers to build 1mm of height, so you can imagine there were many thousand layers necessary to build this jawbone."
Once completed, the part was given a bioceramic coating. The team said the operation to attach it to the woman's face took four hours, a fifth of the time required for traditional reconstructive surgery.
"Shortly after waking up from the anaesthetics the patient spoke a few words, and the day after the patient was able to swallow again," said Dr Jules Poukens from Hasselt University, who led the surgical team. "The new treatment is a world premiere because it concerns the first patient-specific implant in replacement of the entire lower jaw."