Diane, I had experience with this myself when my youngest was not yet 12 months. I had a cavity forming under a very old filling, so it couldn't wait. My understanding is that chewing food, gum, etc, causes the release of mercury. It is continually released. I discussed with my dentist the fact that I was nursing. We discussed the research on mercury exposure, etc. My dentist is experienced in the procedure and took all the proper precautions. I did not wean. I did not have a mercury amalgam put back in this time. My dentist would love to get the rest of the mercury out of my mouth and so would I, but I am waiting until it becomes necessary or I am no longer nursing. I would suggest waiting if it is not something that has to be done immediately. Hope this helps. Aloha, Gloria Thai LLLLeader HAwai'i _____________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com Or call Juno at (800) 654-JUNO [654-5866]