Carbamide peroxide & hydrogen peroxide
All professional grade teeth whitening products contain hydrogen peroxide or carbamide peroxide, which is the bleaching (or stain removing) agent. Hydrogen peroxide breaks down faster than carbamide peroxide, which means it releases most of its bleaching power within 30–60 minutes. Conversely, carbamide peroxide releases about 50% of its whitening power in the first two hours and can remain active for up to six additional hours. Hydrogen peroxide and carbamide peroxide produced equally brilliant results. However there is a noticeable difference in sensitivity when using a hydrogen peroxide compared to carbamide peroxide product. Hydrogen peroxide should only be used in a controlled environment under dental supervision due to extreme gum irritation and hyper tooth sensitivity. Carbamide peroxide can be used at home without dental supervision; however it’s recommended consulting with the dentist first.