| 摘要 |
The present invention relates to a device for setting a spline having damaged vertebras, comprising an anchoring element including a shaft portion (16) to be attached to spaced vertebras, the free end of said anchoring element including a slot (24) for receiving a distracting or, respectively, compressing bar (40), and a cap nut (42) to be screwed onto an outer thread (32) provided in the region of the receiving slot to urge an axial fixing portion (44) towards the ba r received in said receiving slot. The invention is defined in that receiving slo t (24) is formed in a separate swivel head (20) including an inner end in the shape of a ball receiving portion (24) which has an aperture (28) through which said shaft portion (16;52) of the anchoring element (10;50) extends, wherein the diameter o f the shaft portion adjacent said aperture is smaller than that of said aperture ( 28), and that a ball head (14;56) is provided at the end of the shaft portion (16;52) , said ball head having a diameter larger than that of said aperture (28) and said ball head (14;56) in the ball receiving portion (24) entering the terminal regio n of said receiving slot (24).
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