To provide an interdental brush to remove dental plaque in corners and to prevent gingiva from damaging and retraction, by forming the contour shape formed by the tip part of the hair planted part in a plane orthogonally crossing the axial direction of the supporting body into a shape similar to interdentium gap parts.
Hair 6 is clamped in a stainless steel wire 3 and radially planted in a contour shape on the plane orthogonally crossing with the axial line of the stainless steel wire 3, for instance an equilateral triangle, to form first, second, and third vertices 7, 8, and 9, and the tip parts of the other hair 6 planted on the stainless steel wire 3 are formed so as to agree with the straight line mutually tying those three vertices. The contour shape of the equilateral triangle is gradually expanded from the tip part of the stainless steel wire 3 to the base part to form a cut head triangle pyramid. Thus, insertion of a brush part 2 is made easy, and the corner part of an interdental gap part S and the three vertices of the brush part 2 are matched to insert the brush to remove plaque.
SUGIYAMA HIDEKI
HASEGAWA AKIRA
