Soluble tablet, containing abrasive media

摘要

In order to obtain steady erosion from soluble tablets and particularly constant dispersion of contained abrasive media, the employment of magnesium oxide and transverse interlaced polyvinylpyrrolidone (PVP) in defined layers and the admixing of randomly scattered silicic acids is suggested.

主权项

1. A method for cleaning a surface of a tooth, the method comprising the steps of:
(a) continuously flowing a stream of water past a water-soluble tablet, the tablet comprising magnesium oxide (MgO) and cross-linked polyvinylpyrrolidone (PVP) arranged in a plurality of concentric layers, each layer comprising MgO grains and PVP grains, wherein the relationship of the MgO grains and the PVP grains is different in each layer; (b) allowing the stream of water flowing past the tablet to wet the tablet; (c) dissolving the wetted tablet in the stream of water flowing past the tablet, the wetted tablet dispersing MgO grains and PVP grains into the stream of water flowing past the wetted tablet, the MgO grains and the PVP grains dispersed into the water being dental abrasives capable of cleaning a tooth surface by abrasive action; (d) while the wetted tablet is dissolving, directing the stream of water containing the MgO grains and the PVP grains from the dissolving tablet towards the tooth surface and impinging that flow of water against the tooth surface wherein the MgO grains and the PVP grains in the impinging water impinge against the surface of the tooth; and (e) cleaning the tooth surface at least in part by the abrasive action of the MgO grains and the abrasive action of the PVP grains both impinging against the tooth surface.