These products use hydrogen peroxide in concentrations ranging from 25 percent to 40 percent and are sometimes used together with a light or laser, which the companies state accelerate or activate the whitening process. However, most studies have reported no additional long-term benefit with light-activated systems.
Prior to application of professional products, gum tissues are protected either by isolation with a rubber dam or application of a gel.
Whereas home-use products are intended for use over a two-to-four week period, the in-office professional procedure is usually completed in about one hour.
Due to the discontinuation of the professional component of the Seal Program on December 31, 2007, professionally applied bleaching products are no longer eligible for the ADA Seal of Acceptance.
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