Posts for tag: teeth whitening
Some of the most popular smile enhancers on the market today are both over-the-counter (OTC) and professional teeth whitening products. And while studies indicate that bleaching can successfully achieve noticeable increases in whitening of stained teeth, there are some facts you need to know about these products and the results that they can deliver.
- Nearly all bleaching products contain the same basic ingredient, carbamide peroxide or its breakdown product, hydrogen peroxide. However, the products our office uses to professionally whiten your teeth are much stronger without compromising the health and safety of your teeth, gums, and mouth.
- OTC bleaches typically contain no more that 10% carbamide peroxide while professional bleaches can contain between 15% and 35%. And to make professional bleaching even more effective, we may use them in combination with specialized lights or lasers.
- Bleaching is NOT a permanent solution and thus results will diminish over time. The “fade rate” begins to occur 6 to 12 months after treatment.
- While you can't avoid the fading process, you can extend your bleaching results by avoiding foods and drinks that stain your teeth, such as red wine, red (tomato-based) sauces, coffee, tea, sodas/colas, and blueberries to name a few.
- Another method for extending your results is to use a straw when drinking beverages that can stain your teeth so that the liquid does not come in contact with your teeth.
- If you have visible crowns and/or veneers mixed with your natural front teeth, it may be quite difficult for you to bleach your natural teeth so that they perfectly match your veneers or crowns. Remember, tooth whitening is not effective on crowns, veneers, bridgework, or any type of artificial tooth.
- One of the most common side effects of whitening teeth is tooth sensitivity and irritation of the gum tissues. They both are usually temporary and often occur when you start bleaching; however, they generally subside after a few days.
Overall, bleaching your teeth is an effective way to brighten your smile with minimal side effects. If it is something you are interested in pursuing, talk it over with us first — even if you plan to use OTC products — so that you have a clear understanding about your specific options and projected outcomes. Or, learn more by reading the Dear Doctor article, “Teeth Whitening: Brighter, Lighter, Whiter....”
When you have your teeth bleached in a dental office, the results almost seem like magic. Let's push aside the magician's cape and see what is really happening in professionally-applied, in-office tooth whitening.
How do teeth become discolored?
A tooth's enamel covering is mostly composed of mineral crystals. At a microscopic level, you can see a framework or matrix of organic (living) matter interspersed between the crystals of enamel creating a very irregular surface capable of retaining stains. Chromagenic (color generating) organic compounds can become part of this organic matrix resulting in tooth staining. They can be bleached without affecting the mineral structure of the tooth's enamel.
As people get older and their teeth wear, the enamel loses its youthful translucency and the underlying layer, called dentin, thickens and becomes more yellow. Such changes to the actual tooth structure are called intrinsic staining. Other causes of intrinsic discoloration are exposure to high levels of fluoride or tetracycline antibiotic administration during childhood, tooth decay, or root canal problems, among others. Discoloration can also be caused by external staining from certain foods, drinks, or tobacco products. Such surface stains are called extrinsic staining.
Behind the Magic
Materials used for tooth bleaching are hydrogen peroxide and carbamide peroxide. Peroxides are commonly used as bleach, and you may have seen them used as hair bleaches, for example. Hydrogen peroxide is a strong oxidizing agent that attacks the organic molecules responsible for tooth discoloration, bleaching them until they lose their color. Carbamide peroxide also contains urea, which is a compound that permits the peroxide to remain in contact with the teeth for longer amounts of time without harming them.
Often called power bleaching, the in-office technique uses a high concentration of peroxide solution (35-45% hydrogen peroxide), placed directly on the teeth in the form of a gel. A heat or light source may enhance the peroxide release. The gel is applied with trays custom fitted to your mouth, and specific barriers are applied to protect sensitive gum tissue from the solution. Results show teeth becoming up to ten shades lighter in about an hour.
In-office bleaching under the supervision of my staff and me is recommended if you have severely stained teeth, and particularly if you are about to have veneers or crowns made. It's a way to rediscover the pearly translucency of your youthful smile.