I asked my dentist what he recommended. I have no molars in my top left quadrant. He is a biological dentist. He indicated to me that there has some work been done with sapphire as a non-metallic base. I have yet to follow that up as I am still detoxing after 2 years and I want to make sure that my immune system is strong enough to handle any crud that is churned up during the procedures.
ALCAN