| 摘要 |
The dentifrice contains a water-soluble zinc salt and a hydrous silica gel polishing agent compatible and substantially non-reactive with the zinc salt. The astringent dentifrice may additionally contain alkali metal monofluorophosphate, alkali metal carboxymethyl cellulose or combinations thereof, each of which is substantially non-reactive with the zinc salt and the hydrous silica gel. |
