Dental plaque disclosing compositions

Claim 1

A composition in the form of an aqueous solution, aerosol spray, chewable tablet, wafer or lozenge for application to the oral cavity for accomplishing the differential disclosure of dental plaque, said composition consisting essentially of FDC Red. No. 3 and FDC Green No. 3, said FDC Green No. 3 being present in from about 0.1 to 4 parts by weight for each part by weight of the FDC Red No. 3, said composition differentially staining areas of old, thick accumulation of dental plaque blue and thin, recent deposits of dental plaque red, whereby effectively practiced plaque removal on a given tooth shows, and can be photographed, as either no stain pickup or thin deposits staining red, while certain areas on said tooth if consistently missed, will be considerably thicker and therefore stained blue, and on some teeth, an intermediate definite purple zone can be distinguished between the red and blue areas, said intermediate definite purple area tending to look more like blue plaque than red plaque, but the thickness of this purple plaque being less than that of blue plaque, while tooth surfaces not covered with plaque do not show the dye at all.