| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a dental worked cutter whose sharpness remains unchanged regardless of whether the users are right or left handed, without clogging its blade even when it has been used for a long period of time. SOLUTION: A dental worked cutter whose one or a plurality of blades being protruded outward respectively from the tip of a rotational axis at the center with an enough distance between the blades so as not to cause their clogging provides the surface that comes into contact with a smooth object to be cut, almost along with the cylindrical surface having its axial center in the above rotational axis at the protruded tip of the above blades and also provides the sharp blades on the both edges in the positive reverse rotational direction of the above surface that comes into contact.</p> |
