My silver tooth is coming off. What should I do?

As long as the existing crown did not break or have recurrent decay there is a possibility that you can keep it.  I would take the recommendation of your dentist.  Good luck.  

Hi:Often times your crown can be adjusted so that you don’t feel a bump in the back.  I suggest you go back to your dentist for adjustment.Best,Dr. Maddahi

Hi:The root of the tooth will decay but may not fall out since it is supported by bone.  It’s best to have the root removed before it decays.Best,Dr. Maddahi