Tooth colored/white fillings are made of a light cured resin, which is hardened in the mouth by a blue (curing) light.
§What is tooth-colored fillings life span?
Some tooth colored fillings may last as long as silver fillings thanks to improvements in the compression and bonding strength of resin materials.
§Should I change all my silver fillings to tooth colored fillings?
There is no need to change your silver fillings, if there is not a crack or decay within the tooth, however you can dramatically alter the aesthetic beauty of your teeth by doing so.