I have been very pleased with the effect that clay has been having on my cavitations (osteonecrosis/myelitis.) I wear an athletic mouth guard that I bought at a sports store for $1.99, place some moistened Green Clay in it and wear it overnight. It is bringing about a definite and significant reduction in pain. I've started other friends with similar pain on it here and they too are impressed!
Feel free to email me if you want to know more about it:
ckinear "at" yahoo "dot" com