I was sent an artical containing this text. quote..Thyroid disease, particularly hypothyroidism, has been on the rise in recent years. Dr. Blanchard suggests that environmental toxins may inhibit production of thyroid hormone, noting that dental x-rays (where the thyroid is improperly shielded) and toxic chemicals are possible culprits. Also, age itself can be a factor, he says: "As our metabolic and immune systems slow down, we're more prone to infection and immune disease, both of which can manifest as hypothyroidism." Unquote...My Thyriod levels dropped about a week after having a number of x-rays for removing two amalgam fillings from my teeth. Does the body repair the damage to the thyriod after dental work or do we loss the cells forever after dental xrays. All I was provided was a cover in the form of a pinafore to cover my chest and body. Why aren't dentist told to cover us up completely...