| 主权项 |
1. A toothbrush comprising:
a head having a head width and extending along a longitudinal axis; a handle extending along the longitudinal axis; a first set of bristle tufts arranged along a first row, all bristle tufts of the first set of bristle tufts attached to the head and oriented at a first angle leftward of a vertical position, the first row being substantially perpendicular to the longitudinal axis and substantially spanning the head width; a second set of bristle tufts arranged along a second row, all bristle tufts of the second set of bristle tufts attached to the head and oriented in the vertical position, the second row being substantially parallel to the first row, substantially perpendicular to the longitudinal axis, substantially spanning the head width, and adjacent to the first row; and a third set of bristle tufts arranged along a third row, all bristle tufts of the third set of bristle tufts attached to the head and oriented at a second angle rightward of the vertical position, the third row being substantially parallel to the second row, substantially perpendicular to the longitudinal axis, substantially spanning the head width, and adjacent to the second row, wherein the second row is located between the first row and the third row. |
