| 摘要 |
An anchoring element for fastening a rod of a device for adjusting a human or animal spine to a vertebral bone, and having a holding device that is substantially U-shaped and includes two substantially parallely disposed holding ridges, a rod receiving slot being formed therein, and a securing element acting against the rod accommodated in the receiving slot. The securing element includes a locking element and a ring element and the ring element is mountable to the free end of the holding ridges by means of a single turn coupling system. Further a partial thread can be provided on opposing sides of the holding ridges and two opposing thread portions and two opposing entrance portions can be configured on the circumference of the ring element the diameter of the securing element in the region of the entrance portions not exceeding the core diameter of the thread portion so that the thread portions are engageable with the partial threads of the holding ridges and the thread portions and the partial threads comprise buttress threads.
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