Patent ID: 8424145

Claim:
A toothbrush, comprising: a head portion; and a plurality of needle-shaped bristles disposed on said head portion, each of said plurality of needle-shaped bristles being folded in an asymmetric U-shape so as to have a first end and a second end extending outwardly of said head portion, said first end having a height difference with respect to said second end of between 0.5 and 2 millimeters, each of said first end and said second end having a length of tapering of between 3 and 7 millimeters, the first ends having respective chemically and non-mechanically shaped blunt end points having various diameters ranging from 0.01 to 0.07 millimeters, and the second ends having respective chemically and non-mechanically shaped blunt end points having various diameters ranging from 0.01 to 0.07 millimeters.