Delivery, substantivity and clinical response of a direct application percarbonate tooth whitening film.

Purpose: A novel overnight bleaching system containing 19% sodium percarbonate and silicone film forming agents (Crest Night Effects) is described, along with research supporting the substantivity of the product on tooth surfaces and its resulting whitening efficacy.

Methods: Nine adult volunteers were enrolled in a study to determine overnight retention (substantivity) of the product. A non-reactive blue pigment was added to the product to aid in evaluating retention.