For this set of bleaching agents, the usual recommendation is to use twice daily and the waiting time can reach two weeks before the effects can be realized. In terms of price, expect to pay $3 to $10 for teeth whitening toothpastes. And for other bleaching formulations, some over the counter products can fetch around $30. Again not everyone suffers mouth and gum irritation. Uneven Teeth Coloration Mouth whitening and bleaches only affect the color of the teeth. What it does not bleach are crowns, veneers, restorations and other materials relative to tooth repairs. So while the teeth are becoming whiter with every application, those that are not retain its original color and results to uneven coloration. And depending on the attending dentist, the formulation may contain the hydrogen peroxide or the carbamide peroxide. Either way, it can be expected that the whitening effect can be achieved. There are some cases when light or the laser will be used. The light will act as the heating agent that will be used to activate the peroxide content in the whitening formulation. Now the next time that you are in need of teeth whitening you know where to turn no. Speaking of bleaching, this is what you need if you have yellow teeth. If you have brown or gray teeth, then bleaching will not be as effective as you will expect. When shopping for this product, do keep in mind that the crowns, the fillings and the veneers will not be affected by the whitening action of the paste. If for example there are other serious concerns relating to the oral health condition, then the practitioner will not recommend outright teeth whitening procedure. Rather that person will be referred back to the dentist for proper assistance. If the pre-check reveals no problems, then the person will be up for the procedures related to teeth whitening. The whitening solutions may get into the decaying part of the teeth and this can result to sensitive teeth. If you have filling, crowns and restorations then it is not encourage that you try these teeth whitening procedures. The reason for this is that the whitening agents will not act on these. And if it does, then there will be uneven whitening on the teeth.