Soldering investment looks like exactly what's required. Whether I have the manual dexterity to use it successfully is another matter entirely. The part I want to re-attach is slightly smaller than the dental fillings shown in the video, but the pull base and ring are quite a bit larger. That's not a good combination.
The video was absolutely fascinating. I can now understand why dental work is so expensive. Thank you very much for posting it.
bob prohaska