| 摘要 |
<p>A tooth brush to the head (2) of which is fitted two kinds of substances (5, 6) which are comparatively much different from each other in electric potential, such as gold and aluminum, in such a manner that these substances are electrically connected to each other at least at parts thereof, in which bristles (3) are implanted into the brush head through at least one of these substances. A large quantity of water and/or dentifrice present in the mouth when the brush is used acts as electrolyte to form a cell system together with electrodes of said two kinds of substances. The system generates a large quantity of ions at each electrode with the movement of electric energy. Owing to bristles (3) passing through at least one of the electrodes, the ions reach tips of the bristles (3) containing water and being electrically conductive and flows through teeth and gums touching the tips of the brush, so that tartar is decomposed or gums are activated by ion exchange.</p> |
