Unfortunately, we do not recommend using our products if you have amalgam fillings. Although our whitening gel is routinely applied to the front surface of the teeth, excessive gel may inadvertently come into contact with amalgam-restored posterior teeth and increase the susceptibility of those amalgam restorations to corrosion and degradation and increase levels of surface mercury. We always recommend seeing a dental practitioner for advice and the options available for you and if you have any questions or concerns regarding your dental work.