[Scuderia_Turini]

Yo Steve,

In practice, the difficulties with 3D printing are: 1) getting the STL file for the item and 2) smoothing the surface of the finished item.
In the Dental scenario, aspect 2 may not be an issue.  STL files can be scaled so any head could be sized appropriately.

When 3D printing became a thing, my local Asda store had a scanning booth/tent where peeps could stand surrounded by cameras and then get a 3D print of themselves. I don't know anyone who did...   I don't know if they gave you the image file but if they did, it might have been useful.

Leo