| 摘要 |
A dental tool for use with an ultrasonic transducer, includes an elongated unitary shaft member having a longitudinal axis, a proximal end and a distal end having an outer surface having a surface area configuration taken from the group consisting of cylindrical, spherical, teardrop, bell and conical, an attachment member at the proximal end to enable detachable attachment to an ultrasonic transducer; and a cutting surface at the distal end defined by a plurality of grooves on the outer surface forming cutting edges. The cutting surface is formed by running threads around the shank of the tool in one or both directions.
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