I begin chemo/radiation next week(10-17). My doc said I would get sores in my mouth next to the gold crowns on my teeth because the radiation reflects off the gold and causes local high doses in soft tissue next to the crown. I found a reference on the internet saying "the latter problem can be reduced by fitting bulky "teeth guards," custom-made by dentists, for the simulation and treatments. I can't find any such teeth guards and my dentist and doc can't either. Does anyone know where I can find these or what they are made of?? Thanks.