A "filling" is the act of replacing and restoring tooth structure that is damaged due to decay or fracture with a material. Fillings can be made with either amalgam (silver) or composite (white) materials. Both have different benefits and drawbacks depending on the situation, by offering both we can help you decide which treatment is best for you.
In addition, a filling can be done as an "inlay". Inlays are prepared similarly, but the final filling material is fabricated in a dental laboratory. Inlays can be made with porcelain, gold, or even lab formed composite; these types of restorations tend to last longer than most other filling types.