| 摘要 |
An intervertebral implant (1), especially an artificial intervertebral disc, comprising a central axis (2), an upper part (10) which can be arranged on the base plate of a vertebral body located thereabove, and a lower part (20) which can be arranged on the cover plate of a vertebral body located therebelow. The upper part comprises a ventral side surface (11), a dorsal side surface (12), two lateral side surfaces (13,14), an upper apposition surface (15) and a lower surface (16). The lower part comprises a ventral side surface (21), a dorsal side surface (22), two lateral side surfaces (23, 24), a lower apposition surface (25) and an upper surface (26). The two parts (10, 20) can be moved in relation to each other by means of two joints (38; 39) disposed between the two parts. Each of the joints has an axis of rotation (3; 4) and the two axes of rotation are arranged crosswise in relation to each other. Each of the joints (38; 39) has at least one axis (34; 36) which is coaxial in relation to the respective axis of rotation (3; 4) and a bearing shell (35; 37) receiving the axis (34; 36). Roller bodies (70) are inserted between the axes (34; 36) and the bearing shells (35; 37).
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