| 摘要 |
<p>An internal fixation pin (10) comprises first (12) and second portions (14) with threads of different diameters, but having the same pitch and thread depth. The first portion (12) includes a self-tapping tip (20). No enlarged head portion is provided to the pin at the end opposite the tip. A non-threaded shaft portion (26) is frangibly connected to the second portion (14) and is a mechanism for rotating the pin for threaded insertion into bone. A plurality of circumferentially spaced-apart longitudinal grooves (30) are provided on the second portion (14) adjacent its intersection with the shaft portion (26). After insertion of the first (12) and second portions (14) across a fracture, the shaft portion (26) is removed. The grooves (30) permit rotation of the pin for removal should removal be necessary. A driver (40) for pin removal is also provided, as well as a mill tool (60).</p> |
