| 摘要 |
<p>The tool (1) is used in combination with a guiding wire and a guiding sleeve inserted into the affected area, has a toothed front surface (4) and is attached to a handle with its rear end (2). The teeth (4) are of an asymmetrical shape. The front area (3) of the tool (1) is slightly widened, the increase of the diameter starting at the bottom of the teeth (4) or at a short distance above. In a second version a curved lip exceeding the teeth (4) is located at the front (3) in order to protect the nerve from being damaged.</p> |
