| 摘要 |
PURPOSE:To provide a composition for oral cavity application such as candy, chewing gum, dentifrice and mouth wash effective for preventing dental caries and periodontosis. CONSTITUTION:The objective composition contains 0.01-1.0wt.%, preferably 0.05-0.5wt.% (in terms of dry solid) of an extract extracted from birch known as a crude herb drug by conventional extraction method. The extraction solvent is e.g. a low-polarity solvent such as hexane and ether, a high-polarity solvent such as acetone, ethyl acetate, ethanol and water or their mixture. The use of a low-polarity solvent such as hexane and ether is preferable from the viewpoint of antibacterial property. |
