| 主权项 |
1. A fixation assembly for spinal vertebrae, the assembly comprising:
a first anchor sleeve fixedly seatable in a spinal vertebra, having a longitudinal axis, and formed with an outwardly axially extending and open socket having an axially inner end region formed with an internal screwthread and a sleeve-shaped axially outer end region formed with a radially inwardly directed abutment surface and on one side only with an axially rearward extension such that the outer end region of the first sleeve is asymmetrical; a first one-piece metallic pedicle rod extending along the axis and having
an inner end formed with an external screwthread fixedly seated in the internal screwthread of the inner end region of the socket,an elastically deformable dynamic portion extending axially outward from the inner end, andan outer end extending axially outward from the dynamic portion past the other of the sides of the outer end region of the first sleeve and having therein an outer surface spaced radially from the abutment surface of the outer end region of the first sleeve, whereby elastic radial deflection of the outer end engages the outer surface of the outer end with the inwardly directed abutment surface of the first sleeve, the rearward extension projecting axially outward past the outer end of the first pedicle rod; and a connector bearing transversely of the axis on the rearward extension of the first anchor sleeve and fixed to an outer end of a second pedicle rod seated in a second anchor sleeve anchorable in an adjacent vertebra. |
