Let’s say you have to go into the hospital for surgery.
Would you rather have a doctor with experience, or would you rather be your doctor’s very first surgery? Ok, that’s easy – you’d want the veteran. But now imagine that your doctor could rehearse – say the day before you go into the operating room? Even better, yes?
Now let’s make it better still. Imagine that your doctor can rehearse on you. Well, “you” – because what your doctor would be using, is a model of your heart, say. But a model of your actual heart – not a generic heart from the supply room shelf.
That’s possible now, thanks to high-tech polymers and 3-D printing. (The petrochemical propylene, and acrylics, are used to make the polymers. The 3D printer turns those plastics into replica hearts, or other parts of our bodies.)