Adjacent level facet arthroplasty devices, spine stabilization systems, and methods

摘要

The invention discloses an implantable facet arthroplasty device suitable for treating adjacent level disease. The device is designed for implantation between a first vertebra and a second vertebra. Components of the device include: a crossbar; a first component having a first attachment mechanism adapted to attach to a first location of a spinal fusion device attached to a first vertebra and a second attachment mechanism adapted to attach to the crossbar; and a second component having a second attachment mechanism adapted to attach to a second location of a spinal fusion device attached to the first vertebra and a second attachment mechanism adapted to attach to the crossbar. The first component articulates relative to the second component and the first vertebra articulates relative to the device itself.

主权项

1. An implantable spinal device comprising:
a spinal fixation member configured to extend along a first vertebra and a second vertebra of a spine, the spinal fixation member comprising first and second attachment mechanisms adapted to attach the spinal fixation member to the first and second vertebrae, respectively; a facet replacement member coupled to the spinal fixation member and to a third vertebrae, wherein the facet replacement member is coupled to the spinal fixation member between the first and second attachment mechanisms of the spinal fixation member, the facet replacement member configured to provide movement between the first or second vertebrae and the third vertebra, the facet replacement member comprising an anchoring mechanism adapted to attach at least a portion of the facet replacement member to the third vertebra, wherein the spinal fixation member is a fusion member configured to promote fusion between the first and second vertebrae, wherein the facet replacement member comprises a crossbar having first and second ends and the facet replacement member further comprises first and second bearing elements, and when implanted, the first end of the crossbar is seated in the first bearing element, the second end of the crossbar is seated in the second bearing element, and the crossbar is able to move in the bearing elements, wherein the facet replacement member anchoring mechanism comprises first and second bone engaging elements connected to the crossbar, wherein first and second arms extend between the first and second bone engaging elements and the crossbar, and wherein the first and second arms are connected to the crossbar between the first and second ends of the crossbar, and the distance between the first and second arms along the crossbar is adjustable.