Dental veneers are wafer-thin, custom-made shells of tooth-colored porcelain or resin that cover the front surface of the teeth. After removing about a half-millimeter of enamel from the tooth surface, these thin shells are bonded (cemented) to the front of the teeth, changing their color, shape, size, or length.
In dental bonding, a tooth-colored, putty-like resin, which is a durable plastic material, is applied to the tooth and hardened with an ultraviolet or laser light, bonding the material to the tooth. Your dentist then trims, shapes, and polishes it. Bonding can repair decayed, chipped, cracked, or misshapen teeth; it is also a good cosmetic alternative to, or replacement for, amalgam or silver fillings.
A dental crown, also called a cap, fits over and replaces the entire decayed or damaged tooth above the gum line, restoring its shape, size, strength, and appearance. Crowns keep a weak tooth from breaking or hold a cracked tooth together; they can be used cosmetically to cover misshapen or severely discolored teeth. Crowns can be made from metal, porcelain-fused-to-metal, resin, or ceramic.