Is there a cloud behind our silver linings?
In a recent study, Canadian scientists put "silver" fillings, which are half mercury and half silver-tin alloy, in young sheep, which showed signs of kidney failure within months. The scientists thought the mercury might be to blame.
Mercury makes fillings pliable and hardens to a high state of durability. But it's toxic in high doses.
Scientists have known for some time that small amounts of mercury leach out of fillings. But whether that adds up to human fTC risk is still unknown.