But there are some sectors that question the efficacy of whitening rinses in making the teeth whiter. The reason for this may lie in the amount of time that the water enriched with peroxide is in contact with the teeth. For the rinse, the peroxide is in contact with the teeth for 2 minutes a day. Contrast this with the contact that happens with the teeth and the peroxide for strips, where the strips need to be attached to the teeth for as much as 30 minutes! Since teeth whitening and bleaching are among the simplest cosmetic procedures and provided you do not have cracks crowns porcelain veneers, special teeth and gum conditions, home kits are advisable provided you start with a low mixture of bleaching agents and water. Peroxides that are sold over the counter have indications and recommendations for the mixture which you could use. And in some cases, these veneers can also replace the dental crown. If these veneers are selected for use in dental care and for cosmetic reasons, it is important that you must know a thing or two about these products. One thing that should be accepted is the fact that these dental veneers are relatively thin. These products may contain special abrasives and these are the ingredients that work to remove the dirt on the teeth. And these products will always contain chemicals. And it is the role of these chemicals to break down the stains taken down by the abrasives. Half of the reason why this product works can be linked to the proper use and application. This is true because of the dentist-supervised procedures; the dentist will normally use the gel to the gum tissue in order to protect the gums from the possible effects of the process. You will not find these protective measures for the over-the-counter medications and formulations. In terms of cost? The shade of your teeth will also be measured thru the Vitapan shade guide to arrive at a correct shade that your teeth should have. The teeth are not expected to shade lighter than its natural cast. Following that, a retractor will be placed inside the mouth to expose the teeth in the zone visible when you smile.