| 摘要 |
PROBLEM TO BE SOLVED: To provide a toothbrush which is easy to brush every part of a tooth and can brush it certainly by using two kinds of forms of toothbrushes depending on a part and using them in good order with a single stroke, since complete elimination of plaque was difficult although various forms of toothbrushes are conventionally used and designed for removal of plaque. SOLUTION: One toothbrush has a head part where a bristle tuft which is obtained by bundling a plurality of brushes together is laid in two lines to three lines to five lines along the axial direction of the toothbrush and a neck part which follows this. From one side of the head part toward the opposite side, brush length is shortened sequentially to form an angle which is easy to follow a tooth surface. The brush length is approximately 10-15 mm. Additionally, the other toothbrush forms an angle in the opposite direction of the brush. These two toothbrushes make a set. They are used depending on the part and the front or the back side of a tooth. COPYRIGHT: (C)2008,JPO&INPIT
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