I am trying to make a surgical cutting guide (blue) for a jaw bone (white). The top part has to fit on the teeth, the lower part on the side of the jaw bone.
However, when I use the Boolean Difference modifier, it only partially works: The teeth are nicely cut out from the upper part, as you can see below.
But the part that touches the mandible is left open after the boolean, as you can see below.
I guess it might have something to do with the jaw bone model coming from a CT scan so it has an internal (hollow marrow) structure (see below)
I don't know how to solve it though. Is there a way to just 'fill' the jaw bone model and make it completely solid? Thanks for any advice.