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When should metal dental fillings be replaced?

Generally, replacing metal dental fillings for cosmetic reasons should only be done after careful consideration and if your Dr. Palluck feels it won't compromise the long-term health of your teeth. Likewise, there's no need to replace metal dental fillings because of concerns about mercury in your fillings.
Most metal dental fillings are dental amalgam — a stable alloy made with mercury, silver, tin, copper and possibly other metals. Although concerns have been raised over the years about the safety of mercury in dental amalgam, there is no conclusive evidence to support that you're better off having amalgam fillings replaced with alternative materials. The American Dental Association supports the use of dental amalgam as a safe, reliable and effective treatment for dental decay.
If you're unsure whether you need to replace your metal dental fillings, ask your dentist to explain the options and help you understand what's best in your case.