| 摘要 |
A toothbrush for efficiently removing plaque, tartar, and calculus from teeth. The toothbrush includes a grip handle and a crown cap mounted on a distal end of the grip handle. The crown cap is provided with a first tooth fitting portion which includes a pair of walls having curved inner surfaces confronting each other and proximal ends, and a central portion for connecting the pair of walls at the proximal ends. The central portion has a wavy or sinuous inner surface that is continuous with the curved inner surfaces. The curved and wavy inner surfaces have a cross-section of a substantially heart-shape with a lower, opened end, and bristle assemblies are secured on the continuous curved and wavy inner surfaces. The bristle assemblies are elongated and extend at an angle ranging from 30 DEG to 60 DEG with respect to the curved and wavy inner surfaces such that at least one of the bristle assemblies that is secured on one of the curved inner surfaces has a tip end directed toward the wavy inner surface. A second tooth fitting portion having a substantially inverted V-shape could be used on the crown cap, in addition to, or in place of, the first tooth fitting portion. The second tooth fitting portion also includes bristle assemblies which are secured to curved inner surfaces, and extending at angle therefrom.
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