because these teeth you are saving are in poor health and need extraction, they are probs covered in bacteria. So make sure you clean them! -> soak them in bleach for about 10 mins, or if you are on good turn with a dentist you shadowed, ask them to soak them in bleach for 10 minutes then autclave them.
Also, extracted teeth will get brittle over time so you will want to store them properly:
30% glycerol
30% bleach
30% water
you can buy the glycerol at walmart for 3-5 dollars. It is in like a little, clear, plastic tube and is labeled as hand cream or flora preservative.
I have been working at a dentist office for a year now and have saved about 300 + teeth and this is what the dentists told me to do.
Hope this helps!