An applicator for applying a bleaching agent in the form of a bleaching gel composition to the teeth of a user for purposes of whitening or brightening the teeth. The applicator is in the form of an arch or so-called "tray". The applicator is formed of a flexible and bendable ...http://www.google.es/patents/US5702251?utm_source=gb-gplus-sharePatente US5702251 - Applicator for applying a bleaching agent to teeth and method therefor
Applicator for applying a bleaching agent to teeth and method therefor
