Spinal correction construct and method
A spinal construct includes at least one body including a first biasing member engageable with a longitudinal element for translation thereof relative to the body in a first direction. A second biasing member is engageable with a lock. The lock is connected with the longitudinal element to resist and/or prevent translation of the longitudinal element relative to the body in a second direction. Implants, surgical instruments, systems and methods are disclosed.
1. A spinal construct comprising:
a longitudinal element
at least one body including a follower and a first biasing member disposed about the body, the longitudinal element being movably disposed in the body, the follower being connected to the longitudinal element by a pin that extends through the follower and the longitudinal element, the first biasing member applying a force to the follower such that the follower translates the longitudinal element relative to the body in a first direction; and
a second biasing member engageable with a lock disposed with the at least one body, the second biasing member including a sheath and a flange fixed to the sheath, the second biasing member comprising a first end directly engaging the flange and an opposite second end directly engaging an end wall of the body, the lock being connected with the longitudinal element to resist and/or prevent translation of the longitudinal element relative to the body in a second direction.
2. A spinal construct as recited in claim 1 , wherein the first biasing member and the lock comprise a strut to resist and/or prevent translation of the longitudinal element in the second direction.
3. A spinal construct as recited in claim 1 , wherein the longitudinal element includes a first end configured to be connected with vertebral tissue and a second end connected with the follower such that the second end is continuously adjustable relative to the body.
4. A spinal construct as recited in claim 1 , wherein the longitudinal element includes a first end configured to be connected with vertebral tissue and a second end connected with the follower such that the second end is dynamically translatable relative to the body.
5. A spinal construct as recited in claim 1 , wherein the body includes an inner surface having a tapered portion engageable with the lock in a crimp configuration.
6. A spinal construct as recited in claim 1 , wherein the lock includes a plurality of spaced apart bearings engageable with the body to resist and/or prevent translation of the longitudinal element relative to the body in the second direction.
7. A spinal construct as recited in claim 1 , further comprising a release mechanism engageable with the at least one body and the longitudinal element to fix the longitudinal element in a non-expandable and/or compressed orientation relative to the at least one body.
8. A spinal construct as recited in claim 7 , wherein the release mechanism is disengageable from the at least one body and the longitudinal element intra-operatively.
9. A spinal construct as recited in claim 1 , wherein the flange is configured to engage the end wall to prevent translation of the longitudinal element relative to the body in the first direction.
10. A spinal construct as recited in claim 1 , wherein the body includes a stop facing the end wall, the flange being configured to engage the stop to prevent translation of the longitudinal element relative to the body in the second direction.
11. A spinal construct as recited in claim 1 , wherein the sheath defines a longitudinal axis, the flange having a first surface that extends at an acute angle relative to the longitudinal axis and a second surface that extends perpendicular to the longitudinal axis.
12. A spinal construct as recited in claim 11 , wherein the body includes a stop facing the end wall, the first surface being configured to engage the stop to prevent translation of the longitudinal element relative to the body in the second direction, the second surface being configured to engage the end wall to prevent translation of the longitudinal element relative to the body in the first direction.
13. A spinal construct as recited in claim 1 , wherein the body includes an inner surface having a tapered portion, the sheath comprising a plurality of openings and a bearing disposed each of the openings, the bearings being configured to slide between an outer surface of the longitudinal element and the tapered portion to crimp the longitudinal element with the tapered portion to resist and/or prevent translation of the longitudinal element relative to the body in the second direction.
14. A spinal construct as recited in claim 1 , wherein the body includes a groove and a ring disposed in the groove, the lock including a range of movement and the ring defining a limit to facilitate limitation of translation of the longitudinal element in the second direction.
15. A spinal construct comprising:
a rod;
a sleeve including a follower and a spring disposed thereabout, the rod being disposed in the sleeve, the follower being connected to the rod by a pin that extends through the follower and the rod, the spring applying a force to the follower such that the follower translates the rod relative to the sleeve in a first axial direction; and
a lock spring engageable with a lock disposed with the sleeve, the lock comprising a sheath and a flange fixed to the sheath, the lock spring comprising a first end directly engaging the flange and an opposite second end directly engaging an end wall of the sleeve, the lock being connected with the rod to resist and/or prevent translation of the rod relative to the sleeve in a second axial direction.
16. A spinal construct comprising:
a rod;
a sleeve including a follower and a spring disposed thereabout, the rod being movably disposed in the sleeve, the follower being connected to the rod by a pin that extends through the follower and the rod, the spring applying a force to the follower such that the follower translates the rod relative to the sleeve in a first axial direction; and
a lock spring engageable with a lock disposed with the sleeve, the lock comprising a sheath and a flange fixed to the sheath, the lock spring comprising a first end directly engaging the flange and an opposite second end directly engaging an end wall of the sleeve, the lock being connected with the rod to resist and/or prevent translation of the rod relative to the sleeve in a second axial direction,
wherein the flange is configured to engage the end wall to prevent translation of the longitudinal element relative to the body in the first axial direction, and
wherein the body includes a stop facing the end wall, the flange being configured to engage the stop to prevent translation of the longitudinal element relative to the body in the second axial direction.
17. A spinal construct as recited in claim 16 , wherein the sleeve includes an inner surface having a tapered portion, the sheath comprising a plurality of openings and a bearing disposed each of the openings, the bearings being configured to slide between an outer surface of the rod and the tapered portion to crimp the rod with the tapered portion to resist and/or prevent translation of the longitudinal element relative to the body in the second axial direction.
18. A spinal construct as recited in claim 16 , wherein the sleeve includes a groove and a ring disposed in the groove, the lock including a range of movement and the ring defining a limit to facilitate limitation of translation of the rod in the axial second direction.