主权项 |
1. A bone fixation element for fixing a bone fixation plate to a bone, including:
a shank receivable into the bone; a head securable to the bone fixation plate, the head having an external locking thread including: a first thread section adapted to progressively deform a portion of a hole in the bone fixation plate as the head of the bone fixation element is inserted into the hole; and a second substantially parallel thread section adapted to engage with a portion of the hole deformed by the first thread section to thereby secure the head of the bone fixation element to the bone fixation plate. |