Tuesday, 17 December 2013

Tooth Bleaching


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Dental bleaching or tooth whitening is a common procedure in general dentistry but most especially in the field of cosmetic dentistry. Whitening restores natural tooth color and dental bleaching whitens beyond the natural color. Brushing, bleaching strips, bleaching pen, bleaching gel, laser bleaching and natural bleaching are some methods of dental bleaching. In these methods use carbamide peroxide which reacts with water to forms hydrogen peroxide. Carbamide peroxide has about a third of the strength of hydrogen peroxide, or 15% solution of carbamide peroxide is the equivalent of a 5% solution of hydrogen peroxide. The peroxide oxidizing agent penetrates the porosities in the rod-like crystal of enamel. So, bleaches can stain deposits in the dentin. In power bleaching, light energy can accelerate the process of bleaching. Tooth bleaching is not a modern invention, for example, ancient Romans used urine and goat milk, for keeping their teeth whiter. Childes deciduous teeth are whiter than the adult teeth and as a person ages the adult teeth often become darker due to changes in the material structure of the tooth. The enamel becomes less porous and phosphate-deficient. Sometimes food-goods, vegetables rich with carotenoids or xanthonoids and bacterial pigments can make teeth stained. Some antibacterial medications can cause teeth stains or a reduction in the brilliant of the enamel.


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