Posts for tag: teeth whitening
You have a beautiful smile, but you hesitate to show it because of your stained teeth. Fortunately, whitening techniques could take away that embarrassment.
There are two basic types of tooth staining or discoloration: extrinsic, in which the stain is on the surface of the teeth and mostly caused by substances like coffee, wine or tobacco; and intrinsic, which occurs deep within the tooth, caused by such factors as aging, previous dental treatments and fillings, the use of antibiotics (tetracycline, predominantly), or over-exposure to fluoride.
Whitening or bleaching is an effective and relatively affordable solution for many instances of both intrinsic and extrinsic staining. Bleaching solutions are available in over-the-counter (OTC) home kits or as a professional application in the dental office.
Most bleaching solutions use carbamide peroxide, a chemical compound that is effective in removing most stains. OTC home applications contain carbamide peroxide (or an equivalent) in concentrations of about 10% as opposed to 15-35% found in professional solutions. Though less costly than a professional application, OTC products take longer (usually up to three weeks) to achieve desired results. With its stronger solution, a professional application in our office can achieve the same level of brightness in only one or two visits. We may also use special lighting to accelerate the chemical process, as well as rubber dams or gels to protect gums and soft tissues from solution irritation during the procedure.
Although effective, whitening isn't a permanent solution — over time the effect will fade, usually six months to a year depending on how you care for your teeth. Matching tooth color can also be difficult in some cases, especially if you have a mix of natural teeth and artificial crowns or bridges. And, whitening may not be adequate for some types of staining.
Regardless of which application you wish to use — OTC or professional — it's a good idea to visit us first for a professional consultation. We can recommend whether whitening is a good choice for your particular type and level of staining, or if some other option like porcelain veneers might be the better choice. Regardless, there are solutions to the problem of staining, and a way to gain a brighter smile.
If you would like more information on bleaching, please contact us or schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “Teeth Whitening.”
Time to tune up the brightness on your teeth? Here are six modern methods of whitening and brightening your smile.
- In-office “power” bleaching under the supervision of my staff and me is recommended if your teeth are badly stained, or if you are about to have veneers or crowns made. It's quick, safe, and effective. Gels containing high concentrations of bleach are applied to your teeth in our office, often with the enhancement by heat and light to make them act faster. Results show teeth becoming up to ten shades lighter in about an hour.
- “Take home” whitening solutions and trays are designed to fit your mouth and can also be provided by my office. The technique is easy to perform and is less expensive than in-office power whitening system, although it takes longer to see the same results. General recommendations are for 30 minute applications twice a day. You can usually see a change after two to four sessions. This requires patience, because it is important not to exceed recommended exposure in order to avoid damage to your teeth, gums, and the inside skin of your mouth. After two weeks of use, teeth can be expected to be about eight shades lighter.
- Whitening strips look like clear Band-Aids that are applied to the tooth surfaces. They should be worn twice a day for 30 minutes each time, for seven days. On average, they claim to lighten teeth more than three shades. They take about two weeks to work at 30 minutes per day.
- “Paint on” or “Brush on” whitening formulas are also available. These are gels that are painted onto the teeth every night at bedtime, for two weeks. Some claim that this line of home whitening can whiten teeth two to five shades. These gels may make your mouth feel goopy, but they are relatively inexpensive. Some gels come with a small brush to scrub them onto the teeth.
- Over-the-counter “mouth-tray” whiteners use mouth trays that are not designed for your particular mouth, so they may not fit well and may be messy or uncomfortable. They are filled with gel and worn 45 minutes a day for one week. On average, teeth become two shades whiter.
- Whitening gum is a relatively new product. It requires chewing two pieces for at least 20 minutes, four times a day, to see an effect.
Teeth whitening is a great way to improve your smile. For best results and to ensure your safety, teeth should be bleached under professional supervision. We can help you choose the whitening method that's right for you, and monitor the effects of your treatment. Here are some answers to frequently asked questions about this relatively inexpensive cosmetic procedure:
Is teeth whitening safe?
A lot of research has been done on teeth whitening, so we know that specific bleaching formulas, from a reputable source, are safe if used as directed and after a proper dental examination. You should be aware that tooth sensitivity is a common side effect of bleaching, but brushing with a desensitizing toothpaste containing potassium nitrate for two weeks prior to bleaching can reduce sensitivity. Using potassium nitrate during the bleaching process can also help.
Is it effective?
Professional bleaching is very effective. Peroxide goes through tooth enamel (the outermost layer) and the dentin (middle layer) to the pulp (the innermost layer) in 5 to 15 minutes. The bleach actually changes the color of the enamel and dentin, and removes stains.
How is teeth whitening done?
Basically there are three options: in-office whitening (done by a dentist), at-home bleaching with custom-made flexible plastic trays (with prescription bleach), and over-the-counter (OTC) products. Not all OTC products are equal, and the results will take longer to achieve than with professionally supervised procedures.
How long does it take?
That depends on what method you choose and, in the case of at-home whitening, how conscientious you are about following through with your course of treatment. One study found that a six-shade change required either: three in-office applications of 38% hydrogen peroxide; one week of 10% carbamide peroxide used at home nightly in a custom-made tray; or 16 daily application of 5.3% hydrogen peroxide on a whitening strip.
Will it last?
It really depends on the individual. No bleaching method can whiten teeth permanently, though some people's teeth remain white for over 10 years with no touch-up treatment. More typical results vary from six months to two years. Keeping up with your regular oral hygiene routine at home and your professional cleanings at the dentist's office will help maintain the results; so will avoiding tobacco and beverages that stain, such as red wine, tea and coffee. You can also consider a bleaching touch-up once or twice a year at home or here at the dental office.
I want to go for it! What's the first step?
Step one is a pre-bleaching dental examination to determine the cause of your tooth discoloration. We want to make sure that your discoloration is not the result of an oral health-related problem. For example bleaching will mask but not resolve issues such as abscessed teeth, decay, and root canal problems. We want your teeth not only to be beautiful, but healthy, too!
If you are interested in learning more about teeth whitening, please contact us today to schedule an appointment for a consultation. For more information on teeth whitening, please see the Dear Doctor magazine articles “Important Teeth Whitening Questions Answered” and “Tooth Whitening Safety Tips.”
If you have discolored teeth, the cause is often staining on the enamel surfaces from foods, beverages, or smoking. But tooth discoloration may also originate deep within the root of a tooth. Sometimes this happens to a tooth that had to have earlier root canal treatment because of injury or decay.
In such cases the living pulp tissue and its blood vessels and nerves had to be removed from the root canals, resulting in the death of the dentin layer, which makes up most of the tooth's body. Over time this caused the dentin to darken. The color may come from remains of blood that was left in the tissue, or from filling materials left in the root canal that are showing through.
Since these stains are caused internally (intrinsic) and not on the outside of the tooth (extrinsic) they must be whitened from the inside. This is usually done by putting a bleaching agent into the empty chamber from which the pulp was removed. Usually the bleaching agent is a substance called sodium perborate.
When it is mixed with a solution of hydrogen peroxide, sodium perborate slowly bleaches the color from the tooth's internal material. It is considered to be safe and reliable for this use.
The work begins by taking x-ray images to make sure that the root canal is correctly sealed and the bone is healthy. After this, we will make a small hole in the back of the tooth through which the root canal space will be cleaned. The root canal space will be sealed and the bleach will be applied in a putty-like form and sealed off from the rest of your mouth. Every few days this procedure will be repeated until the bleaching reaches the desired level.
At this point a tooth-colored composite resin will be used to seal the small hole that was made in the dentin to insert the bleach. After the tooth has reached the level of whiteness that matches it to your other teeth, veneers or crowns must sometimes be used to repair the surface if it is chipped or misshapen, for example.
Contact us today to schedule an appointment to discuss your questions about whitening internally discolored teeth. You can also learn more by reading the Dear Doctor magazine article “Whitening Traumatized Teeth.”