Several different options are available to change the shape of teeth, make teeth look longer, close spaces between teeth or repair chipped or cracked teeth. Among the options are bonding, crowns, veneers, and re-contouring.
Dental bonding is a procedure in which a tooth-colored resin material (a durable plastic material) is applied to the tooth surface and hardened with a special light, which ultimately "bonds" the material to the tooth.
Dental crowns are tooth-shaped "caps" that are placed over teeth. The crowns, when cemented into place, fully encase the entire visible portion of a tooth that lies at and above the gum line.
Veneers (also sometimes called porcelain veneers or dental porcelain laminates) are wafer-thin, custom-made shells of tooth-colored materials that are designed to cover the front surface of teeth. These shells are bonded to the front of the teeth.
Recontouring or reshaping of the teeth (also called odontoplasty, enameloplasty, stripping, or slenderizing) is a procedure in which small amounts of tooth enamel are removed to change a tooth's length, shape or surface.
Each of these options differ with regard to cost, durability, "chair time" necessary to complete the procedure, stain resistant qualities, and best cosmetic approach to resolving a specific problem. Talk to your dentist to see if one is right for you.