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A 3D printer-created lower jaw has been fitted to an 83-year-old woman's face in what doctors say is the first operation of its kind.
The transplant was carried out in June in the Netherlands, but is only now being publicised.
The implant was made out of titanium powder - heated and fused together by a laser, one layer at a time.
Technicians say the operation's success paves the way for the use of more 3D-printed patient-specific parts.
The surgery follows research carried out at the Biomedical Research Institute at Hasselt University in Belgium, and the implant was built by LayerWise - a specialised metal-parts manufacturer based in the same country.
The patient involved had developed a chronic bone infection. Doctors believed reconstructive surgery would have been risky because of her age and so opted for the new technology.
The implant is a complex part - involving articulated joints, cavities to promote muscle attachment and grooves to direct the regrowth of nerves and veins.