TOOTHBRUSH WITH NEEDLE-SHAPED BRISTLES HAVING IMPROVED CLEANING EFFECTS

摘要

The present invention provides a toothbrush with needle-shaped bristles. The toothbrush includes rectangular setting grooves (1) each of which has a minor axis from 1.5 to 2.5mm in length and a major axis from 2.5 to 4.0mm in length and which are spaced apart from each other at intervals from 1.0 to 3.0mm. The toothbrush further includes the needle-shaped bristles each of which has an end point from 0.01 to 0.02mm is diameter and a tapered part from 40. To 10.0mm in length. Forty-five to eighty needle-shaped bristles are set in each of the rectangular setting grooves (1) at a depth of 4.0 to 5.0mm. The toothbrush of the present invention has cleaning ability superior to that of conventional toothbrushes, in spite of having penetration ability similar to conventional toothbrushes.