Abstract: A resilient dental prophylaxis cup comprising an anticariogenic fluoride agent, up to about 25 per cent (by weight) of a water-soluble thermoplastic polymer material and/or up to about 15 per cent (by weight) of a molecular sieve material, whereby the release of the fluoride ions and the uptake of the fluoride ions by the enamel of the teeth are both increased, providing better protection for the enamel of the teeth against dental caries.

Abstract: Colorimetric indicator compositions and their method of manufacture. A first reagent composition is included in the indicator compositions so that when a second reagent composition is applied to an exposed surface of the indicator compositions a reaction occurs to produce a color change. The indicator compositions include as one component a thermoplastic resin which is soluble in a liquid carrier for the second reagent composition at ambient temperatures. Particularly preferred indicator compositions incorporate a particulate coloring or contrast agent in the resin which, when the liquid carrier containing the second reagent composition is applied on an exposed surface of the indicator compositions containing the first reagent composition, dissolves the resin at the surface to provide a contrasting color background of dispersed particles in the liquid carrier.