| 摘要 |
An intervertebral implant device includes an upper part, a lower part and a core element. The upper part includes an upper surface for engaging a vertebrae and a lower surface which includes a convex portion. The lower part includes a lower surface for engaging a vertebrae and an upper surface having a convex portion. The core element has an upper concave portion to operatively engage with the convex portion on the upper part and a lower concave portion to operatively engage with the convex portion of the lower part. Limited universal movement and translational movement is provided between the upper part and lower part.
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