Mercury in Dental Fillings Disclosure and Prohibition Act - Amends the Federal Food, Drug, and Cosmetic Act to deem any drug or device to be adulterated if it contains mercury intended for use in a dental filling, effective January 1, 2009.

Deems a device that contains mercury intended for use in a dental filling to be misbranded, effective December 31, 2007, unless it bears a specified warning label that it: (1) contains mercury, a highly toxic element; (2) should not be administered to children under age 18 or to pregnant or lactating women; and (3) poses health risks.