Hydrogen peroxide is usually used, and sometimes carbamide monoxide is used, both of which are completely safe. The percentages vary according to professional use or use at home, and carbamide is often used in patients who are allergic to teeth whitening.
Is teeth whitening process considered to be free of the consequences?
The American Dental Association announced their acceptance of some whitening materials and solutions, after trying it on large numbers of American auditors, and the solutions that were accepted by the association:
From 10 percent to 22 percent carbamide peroxide – the only solution a dentist can prescribe for home bleaching.
And secondly: 35 percent hydrogen monoxide – Hydrogen Peroxide – a solution used for teeth whitening at the clinic. These two solutions are the only ones that get recognized. They have no effect on the strength and stiffness of the tooth. The rest of the teeth whitening methods are not recognized and may be effective, but the American Dental Association does not guarantee their safety for human use.
As for the differences between home bleaching and bleaching at the dentist, the period of home bleaching takes only two consecutive weeks, after which you must stop bleaching. The degree of color improves according to the state of the teeth and many other factors, but the dentist’s whitening process often takes one visit that takes (less than an hour) but the resulting sensitivity is usually much greater than that done at home.
Supervision differs, as the whitening process takes place in the dental clinic under the supervision of the doctor. As for the home whitening process, this supervision is lacking. Therefore, the patient must be warned about the need to stop whitening for a day or two in the event of sensitivity in the teeth.
As for the results of whitening in the long run, teeth whitening does not last a lifetime, as people who consume food or drinks contain some dyes (Such as sweets, colored juices, or tea and coffee), or smokers, teeth gradually begin to yellow after one month of bleaching, and the whitening effect can continue for a whole year or more for non-smokers who do not eat food and drinks containing dyes. Bleaching does not remove the outer layer of the teeth when using solutions approved by the American Dental Association, and whitening does not damage the dental filling. It should be noted that the fillings, crowns and bridges are not whiter with teeth whitening solutions. Therefore, teeth whitening may make the color of the filling, crown, or bridge different from the color of the natural teeth that are affected by bleaching, and therefore must be changed the filling or crown or do not bleaching to avoid this problem.