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The active ingredient is hydrogen peroxide. [citation needed] According to a 2009 article in The Washington Post, Consumer Reports found Crest Whitestrips Supreme to be the best of the eight teeth whitening products it tested. [4] This product was the most expensive kit tested by Consumer Reports. [2]
By 1940s and 1950s, ether and hydrogen peroxide gels were used to whiten vital teeth, whereas non-vital teeth were whitened using pyrozone and sodium perborate. [84] In the late 1960s, Dr William Klusmeier, an Orthodontist from Fort Smith, Arkansas, introduced the custom tray bleaching.
In 2015, oral care products (principally produced under the Colgate brand) were the Colgate-Palmolive company's largest source of income, making up around US$7.5 billion, or 47% of net sales globally (with personal care products such as shampoos making up 20%, home care products such as laundry detergents 19% and pet nutrition making up the ...
The process involves scission of a pyrophosphate bond, analogous to hydrolysis. SMFP can also be prepared by treating tetrasodium pyrophosphate or disodium phosphate with hydrogen fluoride. [2] In the laboratory, SMFP can be prepared by hydrolysis of difluorophosphate ions with dilute sodium hydroxide: PO 2 F 2 − + 2 NaOH → Na 2 PO 3 F + H ...
Amalgam filling on first molar. In dentistry, amalgam is an alloy of mercury used to fill teeth cavities. [1] It is made by mixing a combination of liquid mercury and particles of solid metals such as silver, copper or tin.
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