Ideal Teeth Bleaching Agent - It should contain the following properties to qualify as ideal teeth bleaching agent. These properties are listed

1.    It should have neutral PH. This is very important for any teeth bleaching agent.
2.    It should be easy to apply.
3.    It should not irritate the oral tissues.
4.    It should not cause any adverse effect to the teeth being bleached.
5.    It should give desired results within short time.

Teeth Bleaching Materials

There are many teeth bleaching agents available. Some of the most commonly used teeth bleaching agents are hydrogen peroxide, sodium perborate, carbamide peroxide. The sodium perborate is indicated for intra-coronal teeth bleaching whereas the hydrogen peroxide and carbamide peroxide is indicated for extra coronal teeth bleaching. Because of the materials used in professional teeth whitening it is also called peroxide teeth whitening.

Sodium Perborate

if fresh this oxidizing agent contains 95% perborate with 9.9% of available oxygen. Though it is stable in dry state but in the presence of air (warm) & acid, it gets decomposed to sodium metaborate, hydrogen peroxide & nascent oxygen. Their bleaching effectiveness depends upon the content of oxygen. It’s considered safer in comparison to hydrogen peroxide (concentrated solution).

Carbamide Peroxide

This is also called as urea hydrogen peroxide. It’s available in 3 to 45% concentration. But the recommended conc. is 10% carbamide peroxide. They can cause some adverse effects on the health of teeth and mucosa. It also weakens the bond strength and marginal seal of the composites.

Hydrogen Peroxide

it is unstable and can explode, that is why it is suggested that they should be kept in a dark colored bottle or container. It releases toxic radicals and thus they burn the tissues that come in contact. The conc. available is 30 – 35% .
 

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