| 摘要 |
A toothbrush or an electric toothbrush which is capable of scraping off plaq ue and tartar from teeth with a brush portion moved up along the side surfaces of teeth without causing the gums to be separated, by bringing the brush portion into contact with the side surfaces of the teeth and dental necks, and turning the brush portion repeatedly so that the brush portion in this con- dition is slid upward (toward the crown portions of teeth axes) or scooped u p and which is capable of keeping the gums healthy and preventing paradental diseases and dental caries. The electric toothbrus h includes a brush portion (16) adapted to contact dental necks or portions in the vicinity thereof and be turned repeatedly so that the brush portion is scooped up from the lower side (root portions of tooth axes) along the side surfaces of the teeth a member (18) for turning the brush portion repeatedly, and a driving member (68) connected to the brush portion turning member.The manu al toothbrush includes a brush portion (3) posi- tioned at a predetermined angle of inclination with respect to dental necks or side surfaces of the teeth in the vicinity thereof.
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