Tooth bleaching is an important procedure in dentistry as white teeth are an attractive feature of a good smile. A child's teeth is considered more white than adult teeth. With age the adult teeth often become darker due to the changes in its mineral structure as the enamel becomes less porous. Teeth of many people also get stained by foodstuff, tobacco and bacterial pigments. A tooth bleach uses an oxidizing agent to lighten out the shade of the tooth.

An oxidizing agent simply penetrates the enamel of the tooth and oxidizes stain deposits and bleaches the teeth with effects lasting for several months giving a sweet smile. There are two main methods of bleaching- one performed by the dentist and one self-performed. A dentist may usually apply a high concentration of oxidizing agent producing quick results. Such methods may give rise to chemical burns to soft tissues but can be reduced by applying a light-cured protective layer to the gums and papilla. The bleaching gel typically contains 35% carbamide peroxide.

At home whitening may involve purchasing a thin mouthgaurd or a strip that holds a relatively low concentration of oxidizing agent. Results may vary depending upon the chosen application leaving with a whiter teeth in a few days. A typical course could produce dramatic results in the cosmetic appearance of stained teeth. But if the gums are infected or if the teeth are decayed then the results of bleaching are least effective. The results of bleaching are most effective with yellow discolored teeth. The process of bleaching can also be accelerated by the use of light-activated bleaching.

Side effects may include chemical burns if the concentration of the oxidizing agent is much higher and may also discolor mucous membranes or simply over bleach. Rebound effect may also start over 30 day period. This may also temporary increase the tooth sensitivity and mild irritation of soft tissues of the mouth and in particular the gums. Both of these conditions are usually temporary and may disappear within 1 to 3 days of stopping or completing the treatment. So individuals with sensitive tooth or gums should always consult a dentist prior to using any oxidizing agent.

Bleaching is also not recommended in children under age of 16. tooth whitening is also not recommended to pregnant or lactating women. Tooth whitening does not effect the color of fillings and other restorative materials. It can instead restore the color of fillings when they become stained by food, drinks and smoking. No matter what bleaching agent you use, it should always be done after consulting a dentist.