Generally, bleaching is successful in at least 90 percent of cases, though it may not be an option for everyone. Consider tooth bleaching if your teeth are darkened from age, coffee, tea or smoking. Teeth darkened with the color of yellow, brown or orange respond better to lightening. Other types of gray stains caused by fluorosis, smoking or tetracycline are lightened, but results are not as desirable. Consult your dentist, who will determine whether you are a candidate for tooth bleaching and what type of bleaching system would provide the best results: home bleaching or ZOOM.
Most patients choose dentist-supervised home bleaching, which is more economical and provides good results: the dentist or hygienist will make impressions of your teeth to fabricate a mouthguard appliance for you. The mouthguard is custom-made for your mouth and is lightweight so that it can be worn comfortably while you are awake or sleeping. The mouthguard is so thin that you should even be able to talk and work while wearing your mouthguard. Along with the mouthguard, you’ll receive the bleaching materials. You’ll be given instructions on how to wear the mouthguard.
Some bleaching systems recommend bleaching your teeth from two to four hours a day. Generally this type of system requires three to six weeks to complete, this works best on patients with sensitive teeth. Other systems recommend bleaching at night while you sleep. This type of system usually requires only 10 to 14 days to complete.The lightness should last from one to five years, depending on your personal habits such as smoking and drinking coffee and tea. This procedure may not be as costly because you can probably still use the same mouthguard. The retreatment time also is much shorter than the original treatment time.
The active ingredient in most of the whitening agents is 10 percent carbamide peroxide (CH4N2O2), also known as urea peroxide;
Several studies, made during the past five years, have proven bleaching to be safe and effective. The American Dental Association has granted its seal of approval to some tooth bleaching products. those with sensitive teeth