A recent report in the Journal of Occupational and Environmental Medicine suggests that doctors exposed to mercury-containing dental fillings may increase their risk of developing kidney and memory problems. Researchers at the Glasgow Royal Infirmary in Scotland examined nearly 200 dentists and discovered they had four times the normal amount of mercury in their urine and nails compared to the general public. In addition, the dentists developed more kidney disorders and suffered more memory lapses. The scientists warn that more research is required to verify the study's findings.

At high doses, mercury exposure can cause tremors, inability to walk, convulsions and even death. At lower levels, the effect of mercury, while not as drastic, is nevertheless serious. Low-level exposure to mercury may cause damage to the senses and brain.

Recently, the parents of two children filed lawsuits against the American Dental Association (ADA) alleging dental fillings containing mercury contributed to their sons' development of autism.