White enamel hardness decline

A new study shows that the use of home teeth whitening products make people's enamel hardness decreased. According to the person in charge of the study, said Shereen Azer, assistant professor of prosthodontics, Ohio State University, USA, whitening of teeth, enamel hardness by an average of 1.2 to 2 nanometers. Teeth whitening products contain different concentrations of hydrogen peroxide or car amide peroxide; they produce free radicals that attack the enamel integral part of the pigment molecules, so as to achieve the whitening effect.

Azer said that some research trying to figure out the impact of the teeth whitening products on enamel hardness, but study results are inconclusive. He added that, prior to the micron level, the scholars in the reduced enamel hardness, and he used in the study nonsocial. In the study, he removed teeth whitening paste and bay filled with whitening gum, and use of atomic force microscope to observe the teeth on the nanometer scale. A different product for tooth hardness and dental instruments elastic modulus change is roughly the same. However, single and single-bay there are significant differences reduce the hardness of enamel, single bracket than single-whitening paste whitening paste.

Although the study did not rise the hardness recovery whitening teeth, but Azer noted that the large number of studies has shown that fluoride treatment can promote the re-mineralization of enamel. According to the results of the study, he suggested that the new teeth whitening products in the future there should be improved in an effort to Fixed dentures and denture relative to comparative advantage reduce the occurrence of these side effects. The enamel is the hardest structure of the human body. Teeth whitening products may weaken this natural barrier.