A method by which a mucoprotectant gelatin which forms a protective coating on the mucous membranes of the mouth is provided for use with active ingredients for treating the teeth. The active ingredient may be an aqueous hydrogen peroxide solution or fluoride. When hydrogen peroxide is used as a bleaching...http://www.google.se/patents/US5009885?utm_source=gb-gplus-sharePatent US5009885 - Method of protecting the mucous membranes of the mouth while treating teeth
