CNC grinding a bone screw - GIF

[TheElderBrother]

I may wind up with one of those in my leg. They are now using titanium screws to mount prosthetics in amputees, so instead of a socket around your stump, you can just pop the leg onto this long, heavy-duty titanium screw that projects from your stump. It's called osseointegration, and the Aussies have really advanced the science. It simplifies the heck out of wearing a prosthesis. You just have to be careful to care for your insertion site to hold off infection.

Science!