3D Printing is very popular in the medical field and is extremely beneficial. Doctors, researchers and manufacturers use 3D printing to create prototypes of all sorts to mimic the look of the finished device.
Both, Polyjet and Fused Deposition Modeling (FDM) are used in medical prototyping. They both offer biocompatible materials so you are able to use in patient care or experimental work.
White Paper: 3D Printing for Surgical Planning Case Study: Just What the Doctor Ordered