| 摘要 |
PROBLEM TO BE SOLVED: To provide a toothbrush which can easily fit bristle tips even to a tooth having a tooth surface with small curvature and sufficiently get bristle tips into interdental parts to sufficiently demonstrate brushing effect. SOLUTION: In the toothbrush 10 where a plurality of bristle tufts 12a and 12b formed of a plurality of bristles 11 are implanted into a bristle implanting base 14, a plurality of outer bristle tufts 12a provided along both side parts of the bristle implanting base 14 in the longitudinal direction X of the toothbrush 10 are implanted in bristle implanting holes 13 with a length not shorter than 2 mm in the longitudinal direction to have a width not narrower than 2 mm, and the tips of the outer bristle tufts 12a are inclined to one side in the longitudinal direction X via tip curved surfaces 16 in an arc shape which is recessed toward the root part side. COPYRIGHT: (C)2010,JPO&INPIT
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