| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a dynamic fixation support for the spine. <P>SOLUTION: A dynamic fixation medical implant includes a longitudinal connecting member assembly 1 having an elongate coil-like outer member 4 and an inner cylindrical core 8 attached to the outer member at only one end thereof. Some assemblies include a second longitudinal connecting member in the form of a rod that is fixed to the inner core and extends outwardly from the assembly. Certain assemblies include a threaded core or threaded inserts that cooperate with a helical slit of the coil-like outer member 4. Two or more cooperating bone screw assemblies 1 attach to the connecting member assembly. The bone screw assemblies may include upper and lower compression members for affixing to and cradling the coil-like outer member 4 only, allowing relative movement between the outer member 4 and the inner cylindrical core 8. Press fit or snap-on features attach one end of the coil-like outer member to one end of the inner cylindrical core 8. <P>COPYRIGHT: (C)2012,JPO&INPIT |
