whitening strips

purchased in pharmacies and amazon, whitening strips are thin and covered with gel peroxide. They must cover the teeth for 30 minutes twice a day for 14 days. The first results are seen after a few days and are maintained for a period of approximately four months. The cost varies between $ 15 and $ 70 for a treatment of 14 days. Strips and whitening gels contain peroxide concentration lower than the products used by a dentist. Although some gel and some bands are successful, the degree of whiteness is still lower than that obtained from a dentist.