I dunno about that prediction... 3D printed organs will probably be a better strategy. I think some scientists are working on stem cells that can grow into teeth. The trick is to get the right kind of teeth in the right place.. you don't want molars where canine teeth should be.
3D printing in metals isn't a consumer device yet because of the costs and dangers (melting metals by lasers isn't something you typically do in your basement or garage). But some companies are doing it.
Imagine the costs for 3D printing metals! Plastic 3D printing should get cheaper someday, depending on the plastics. But metallic sintering or whatever is needed for 3D printing metals... isn't going to be cheap for a looong time.