| 摘要 |
A dental instrument employs a tool having an upper portion for use in contacting teeth and a lower portion defining a shank with a lower end, a hollow elongated gripping holder having an opening at one end, a device in the holder communicating with the opening in the holder to removably receive said part of the shank, including the lower end; and a manually operated coupling mechanism having a first section connected to the holder and a second section on the shaft, the mechanism having a lock position at which the first section engages the second section in such a manner that the tool is locked in the holder in position for use, and having a release position at which the first and second sections are disengaging and the tool can be removed from the holder. |
