Today, most bleaching products contain either 30-35 per cent hydrogen peroxide or a 10 per cent carbamide peroxide as the active ingredient.
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The use of a non-toxic chemical such as hydrogen peroxide or carbamide peroxide for tooth bleaching has become popular in the new century.
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In-office bleaching procedures generally use a carbamide peroxide, which breaks down in the mouth to form hydrogen peroxide, or hydrogen peroxide itself.
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The next cheapest method is at-home bleaching, which is done by wearing custom-made mouthpieces with a special gel that contains carbamide peroxide.
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The bleaching gel typically contains between 10 % and 44 % carbamide peroxide, which is roughly equivalent to a 3 % to 16 % hydrogen peroxide concentration.
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Though it is not a barbiturate, apronalide is similar in structure to the barbiturates ( being an open-chain carbamide instead of having a heterocyclic ring ).
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The main reason for the difference in the degree of brightness between in-office and over-the-counter products is the strength of the carbamide peroxide solution.
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The bleaching agent _ acceptable mixtures contain 10 percent carbamide peroxide, the equivalent of 3 percent hydrogen peroxide _ is poured into small, thin trays that are molded tightly around the teeth.
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Nite White brand comes in 10, 16 and 22 percent " carbamide peroxide equivalent " concentrations ( speed and power of hydrogen peroxide with sustained whitening activity of carbamide peroxide ).
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Nite White brand comes in 10, 16 and 22 percent " carbamide peroxide equivalent " concentrations ( speed and power of hydrogen peroxide with sustained whitening activity of carbamide peroxide ).
