I have had experience with cavitations and let me just say that I despise the doctors who ignore them. They are organic toxins factory-shops and they can make you sick as anything I have ever seen before. So don't take them lightly.
If you have symptoms and are mercury toxic. Have them look into this first. As this will be the best thing that you can do to heal over your system and to let your immune system cope with the needed dental work to remove mercury.