Created in Treatment, Cosmetic Dentistry
Whitening procedures have effectively restored the smile of people with stained, dull, or discolored teeth.
The darker tissue of your teeth, the dentin, can become exposed as the outer layer of enamel is worn away by the effects of aging or things like caffeine and tobacco.
Food particles are naturally attracted to a tooth's enamel by a certain protein. Products like coffee and tea, berries and soy sauce are notorious for staining teeth. Over time, teeth actually become more absorbent and vulnerable to staining from food and other substances.
One type of stain—caused by traumatic injuries, medications and fluorosis—actually begins inside the tooth; brushing and flossing don’t help. Another type of stain—one that can be more easily attacked by brushing, flossing and rinsing—is caused by external factors such as foods.
More and more people today are choosing tooth-whitening procedures to reverse the effects of aging and abuse from food and tobacco stains.
Some commercially available "whitening toothpastes" can be somewhat effective at removing stains and making teeth a few shades brighter. However, many of these products have abrasive substances that can actually wear away your tooth's enamel.
Whitening agents actually change the color of your teeth, but only are effective on certain types of stains. For example, bleaching agents have a difficult time removing brownish or grayish stains. These products also are not as effective on pitted or badly discolored teeth, or on restorations such as crowns, bridges, bonding and tooth-colored fillings (porcelain veneers or dental bonding may be more appropriate in this case).
Professional whitening performed by our office is considered to be the most effective and safest method; done properly, tooth whitening can last as long as five years. Over-the-counter whitening systems are somewhat effective as long as they are monitored and directions followed closely.
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.
Veneers are usually made by a dental lab technician working from a model provided by your dentist. Veneers are usually irreversible because it`s necessary to remove a small amount of enamel from your teeth to accommodate the shell.
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. 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, the veneers are placed on the tooth surface with water or glycerin on the teeth to check their fit and get a sense of the shade or color. While the veneers are resting on your teeth, they can be adjusted with various shades of cement to match the color of your teeth. To apply the veneer, the tooth is cleansed with specific chemicals to achieve a bond. 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.
During a two-week period of adjustment that follows, you may notice the change of size and shape in your teeth. It is important to brush and floss daily. After one or two weeks, you'll return for a follow-up appointment. 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.