Many of us require fillings at some point in our lives. Fillings are used to restore decayed teeth, broken teeth, or sometimes even worn down teeth. Thanks to a wide variety of materials, fillings can vary in strength and looks. The fillings that most look and act like natural teeth are porcelain fillings. These are more commonly referred to as inlays and onlays. They are very durable in areas where large fillings are needed and blend well in a natural smile. They are fabricated at a dental laboratory and have the same strength as a crown, but allow as much natural tooth structure to be left as possible. Resin or composite fillings do not have quite the same strength as porcelain but work nicely when smaller fillings are needed. Amalgam or silver fillings are the least aesthetic, however, can function well for many years.