Is teeth whitening new?
Tuesday, December 19th, 2006Within many centuries teeth were bleached by various oxidizers. In 1877 Chappel has described bleaching teeth with an acid, and bleaching of a teeth by peroxide of hydrogen is described in 1884. Harmlessness of the basic chemical agents is confirmed more than 700 international clauses published since 1945. For last 10 years in America the most widespread method of bleaching is at home bleaching. This method was spent more than to 10 million to patients as a result of whom desirable results have been received.