Just a quick question. Im getting a crown for a root-canal tooth and want to avoid all metals. I had amalgam fillings removed and it made a big difference to baseline so avoiding any heavy metals is essential. Ive asked for a white crown, which i have to pay for on the NHS (the free one is metal), however i want to make sure there arent any sneaky pieces of metal that are smuggled in somewhere underneith. Does anyone know anything about this procedure and can adavice? (especially if you are from the UK and are familiar with the system here)