| 摘要 |
An artificial facet (10) is implanted and attached to the spine (14). The artificial facet is an assembly of components that includes a rod formed of first and second curved sections (22, 24). First and second pedicle screws (26, 28) are connected to the first and second curved sections, respectively. The first curved section has a sliding engagement with the second curved section along a curved longitudinal axis to allow adjustment of the length of the rod along the curved longitudinal axis. Each of the first and second pedicle screws incorporates a polyaxial head (40) to enable lateral movement of each of the pedicle screws in a plane transverse to the curved longitudinal axis of the rod. The first and second pedicle screws are connected to the respective first and second curved sections with set screws (42) so that the position of the pedicle screws along the curved sections is adjustable.
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