| 摘要 |
PURPOSE: To keep the dimensions of a part connected to a tool small and draw a bone nail from a medullary cavity by this tool by inclining the mutually confronting end faces which form a transit part between a flat part and a bone nail peripheral surface parallel to each other and at a specified angle to the flat part. CONSTITUTION: A bone nail end 6 of the distal side has the same section as the remaining bone nail part, and has a flat part 7 shifting to the peripheral surface of the bone nail at the end faces 8. The end faces 8 are parallel to each other and are extended parallel to each other and obliquely to the flat part 7 to form an angle different from 90 deg. up to the flat part 7. The inclination of the end face 8 is selected to be extended toward the bone nail end of the distal side between the peripheral surface of the bone nail and the flat part 7. When a tool part cooperated with the flat part 7 drives a bone nail, especially in the case of drawing a bone nail by use of the tool, it is possible even if only a small space is given for introducing the tool 17 in a guide path for an insert piece. |
