I have kept pulled teeth in isopropyl alcohol for years because I want to make a necklace from them but they are turning black. How can I either keep them the way they are now or make them white again. How can I preserve them for future use?

I kept my wisdom teeth is a box for 20+ yrs until my new husband found them and thought I was crazy! Lol
I don't think you have to keep them in anything to preserve them just keep them out of Coca Cola or vinegar!

Use a solution of 1 part bleach to 9 parts water. And add a few drops of glycerol into the solution. This keeps the teeth hydrated and sanitized and white!