Enough uncertainty surrounds silver-colored metal dental fillings with mercury that U.S. regulators should add more cautions for dentists and patients, a U.S. advisory panel [has] said. The fillings should be accompanied by warnings about unknown risks for vulnerable people such as children and pregnant women. There really is no place for mercury in children," Suresh Kotagal, a panelist and neurologist at the Mayo Clinic in Rochester, Minnesota, said of the toxic metal. Mercury has been linked to neurological damage at high exposure levels and makes up about half of a metal filling. While the panel stopped short of urging a ban, it wants the FDA to look at the latest data and reassess its guidance after the agency last year declared the fillings safe. Some European nations have banned amalgam use. Critics told the advisers there was a clear link between mercury fillings and side effects, especially in more vulnerable patients. They should be banned or not implanted unless patients give consent, they said.