| 主权项 |
1. An implant assembly, comprising:
a first rod including an inner wall defining a first passageway therein, the first rod having a first end and a second end, the passageway of the first rod accessible from the second end of the first rod; a first polyaxial screw having a first rod retainer, the rod retainer retaining the first end of the first rod; at least one intermediate rod, the at least one intermediate rod telescopically disposed within the first passageway of the first rod for movement relative to the first rod, the first rod and the at least one intermediate rod configured to be retained in one of multiple telescoping positions, the at least one intermediate rod including an inner wall defining a second passageway therein; a second rod having a first end and a second end, the first end of the second rod telescopically disposed within the second passageway of the at least one intermediate rod for movement relative to the at least one intermediate rod, the at least one intermediate rod and the second rod configured to be retained in one of multiple telescoping positions; a retaining mechanism that retains the at least one intermediate rod in at least one telescoped interconnection position relative to the first rod, the retaining mechanism comprising a first flexible ring member disposed about one of an annular recess of the first rod and an annular recess of the at least one intermediate rod; a retaining mechanism that retains the second rod in at least one telescoped interconnection position relative to the at least one intermediate rod, the retaining mechanism comprising a second flexible ring member disposed about one of an annular recess of the at least one intermediate rod and an annular recess of the second rod; the first rod and the at least one intermediate rod having a telescoping connection that allows for and limits a range of relative motion between the first rod and at least one intermediate rod while maintaining a consistent total interconnected length of the first rod and the at least one intermediate rod, the first flexible ring member being compressible and allowing the first rod and the at least one intermediate rod to be pulled telescopingly apart and brought telescopingly together by adjusting a compression of the first flexible ring member; the at least one intermediate rod and the second rod having a telescoping connection that allows for and limits a range of relative motion between the at least one intermediate rod and the second rod while maintaining a consistent total interconnected length of the at least one intermediate rod and the second rod, the second flexible ring member being compressible and allowing the at least one intermediate rod and the second rod to be pulled telescopingly apart and brought telescopingly together by adjusting a compression of the second flexible ring member; and a second polyaxial screw having a second rod retainer, the second rod retainer retaining the second end of the second rod. |
