We work with Brass & Bronze only & we plate in copper & nickel. The shrinkage in both the wax & the bronze combined is minimal which is why I ran this test. The teeth you see here wont be used, I'm intending to cast the teeth with no gum, instead the teeth will be connected to a thin metal strip & then cast the gums in plastic around the metal. Doing it this way will save weight & will give a good bonding surface.The lost wax casting on the other hand sounds very interesting. I work in a foundry for 3 years now, but mostly in the metal workshop. But I know the trickiness of wax well. Not an easy material to work with. Nickel plated bronze teeth for bob would be wonderful! Even though I would prefer polished stainless steel ones .
If you got any questions about lost wax casting, maybe I can help. The shrinkage of the wax is always an issue, unfortunately.