| 摘要 |
The implant device consists of two end elements (1) for anchoring to the abutting vertebrae and an intervening middle element (2), which is connected to each of the end elements (1) by means of a threading (3, 4), whereby the two threadings (3, 4) are arranged parallel to the axis of the spinal column and run in opposite directions to each other, so that when the middle element (2) is rotated, the overall length of the implant device can be adjusted. All three elements (1, 2) of the device are designed in the shape of tubular casings with a circular crosssection, at least in the area of their threadings (3, 4), and are threaded into each other along their axis. The walls of the casings are perforated with orifices.
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