Hasta La Motion!

Hey everyone, I’m attempting to shoot my first feature with my own money and there’s a particularly tricky scene that I was trying to figure out how to shoot before actually shooting.
In the scene one of the characters has her lower jaw ripped off by a bear/fox trap. My method for shooting this was to have a prosthetic jaw placed over her real jaw which would be covered by a chroma key stocking. The prosthetic would be ripped off and the green would be chroma keyed out in post and replaced with gore. I have a few SVA students on board to help in post but I wanted to know if that’s the proper way to proceed.

Here is the original rough mockup I devised.