We consider all these options available for you, and we check their differences and the benefits that can be delivered to you. Options offered in supermarket and drugstores For those who want to take care of the problem themselves, the products offered at supermarkets and drugstores are the solutions. What it contains are silica for example and some aluminum and calcium that will be enough to remove stains but not really to counter the natural discoloration of the teeth as it ages nor does it contain substances that react with the mineral structure to whiten a dark colored teeth. Second, most tooth bleaching agents such as gurgles and gels contain peroxide. Teeth whitening strips are very flexible, very easy to use thin strips of plastic coated with bleaching agents that stick to the teeth. It comes in pairs designed for the upper and the lower teeth configuration and is applied in areas where the teeth are visible as the person smiles. Unlike other teeth whiteners, the whitening is only on the aesthetic area and like all whitening products; it is kept in the mouth for a period of time. This is so because in-office bleaching methods have more bleaching concentration than that which is offered over the counter thereby producing faster results. In-office tooth bleaching is also the safest. Unlike tooth whitening done at home, in-office whitening is conducted and monitored by a professional practitioner. First, the tooth enamel is a highly mineralized very hard part of the tooth composed of strand of rod-like crystalline materials. These rods while very tightly packed have microscopic gaps in between them. The density of the crystalline rods differs from individual to individual and explains the reason why some tooth enamel are tougher than another person's enamel. The said whitening agent or formulation will then be allowed to stay on the teeth for the next 30 to 60 minutes. Again, the longevity of the process will ultimately depend on the manufacturer of the product or the whitening formulation. The moment that the intended shade of white has been achieved, then the teeth will be rinsed with water.