| 摘要 |
A shank for a dental instrument, including instruments which are used in endodontics and in dental prophylaxis, is fitted on a contra-angle or a handpiece and is provided with a rotary drive which cooperates directly with the rotary transmission members of the kinematic chain of the contra-angle, upstream of the head of the contra-angle. Also, the head of a dental instrument which is equipped with such a shank.
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