Teeth that are badly stained, shaped or crooked may be improved by a veneer placed on the surface of the affected teeth. Veneers are thin pieces of porcelain or plastic cemented over the front of your teeth to change their color or shape. Veneers are used on teeth with uneven surfaces or are chipped, discolored, oddly shaped, unevenly spaced or crooked. Little or no anesthesia is needed. Veneers have a longer life expectancy and color stability than bonding, and highly resist permanent staining from coffee, tea, or even cigarette smoking.
Porcelain veneers can mask undesirable defects, such as teeth stained by tetracycline, by an injury, or as a result of a root-canal procedure, and are ideal for masking discolored fillings in front teeth. Patients with gaps between their front teeth or teeth that are chipped or worn may consider porcelain veneers.
Typically, veneers entail at least three appointments: diagnosis and treatment planning, preparation, and bonding.
During the tooth preparation visit, usually lasting one to two hours, the teeth are lightly buffed to allow for the small added thickness of the veneer. Usually, about a half a millimeter of the tooth is removed, which may require a local anesthetic. For certain patients no preparation of the teeth may be necessary. During the same visit, a mold is taken of the teeth, and sent to the laboratory for the fabrication of the veneers.
During the final "bonding" visit, also about one or two hours, Once a special cement is sandwiched between the veneer and tooth, a visible light beam, or laser, causes a catalyst to be released, hardening the cement. It is important to brush and floss daily. Porcelain veneers are reasonable facsimiles of natural teeth, not perfect replacements. It`s not uncommon to see slight variations in the color of porcelain veneers upon close inspection, as this occurs even in natural teeth.