(57) Abstract With the head the head which has the bristle which formed in one body is included, this bristle is locked by one body to the upper surface of the head, at least one among this aspects, offers the co-cured toothbrush which gradually moves to facing outside as a slope in the territory where it is close to the upper part surface of the head in order to hold down damage and deformation to minimum with the section of the polygon which is stipulated at least by three aspects. It has the section of the triangle which has the slope where the bristle, two among the surfaces differs desirably mutually.
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