There are a large variety of materials used in indirect composites. As with ordinary composites, some of these materials are toxic or allergenic. Indirect composites can be used in large cavities and can be used in place of gold. They can even be used in place of gold crowns. They last as long as gold.
Many dentists feel that indirect composites are a bit softer than gold and more like real tooth.
They look like real tooth. Indirect composites are fairly new and many dentists don't know how to place them properly. Always find an experienced mercury-free dentist to place indirect composites. Indirect composites are just as expensive as gold. When an initial amalgam filling is placed in a tooth that has never had one before, a larger amount of the tooth has to be drilled away.