Spinal multi-level facet joint stabilization system
AssigneeLinkSPINE, Inc.
InventorChristopher D. CHAPUT
Life of this patent
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Abstract
A stabilization implant for a facet joint of a first vertebrae includes a support module and a transfacetal fastener, wherein the support module is provided on either side with a holder for the transfacetal fastener, the transfacetal fastener having a head and a main body traversing the facet joint. The transfacetal fastener may include a super-head to form a stacked double-head arrangement, a top carrier on a top side of the transfacetal fastener, and an upward extension element, which is pivotally attached to the top carrier and which reaches upward and has a fixation portion at its upper end, the fixation portion configured for an oblique fastening to cortical structure of a second, adjacent upper vertebrae.
Claims27
A stabilization implant for a facet joint of a first vertebra, the stabilization implant comprising a support module and a transfacetal fastener, wherein the support module comprises a holder for the transfacetal fastener, and the transfacetal fastener comprises a main body configured for traversing the facet joint of the first vertebra, a head and a super-head to that together form a stacked double-head arrangement, a top carrier located on a top side of the transfacetal fastener, and an upward extension element that is pivotally attached to the top carrier, extends upward, and has a fixation portion at an upper end, the fixation portion configured for oblique fastening to a cortical structure of a second vertebra.
A fixation assembly for an implant, the fixation assembly comprising a fixation element and a holder, wherein the fixation element comprises a ball head, and the holder comprises a sleeve, a tension cage, and a pressing element, wherein the pressing element is attached to an inner portion of the sleeve via an internal thread, the pressing element being configured to bear on the tension cage such that the tension cage is squeezed together for arresting an angular position of the ball head, wherein a surrounding skirt is provided on a front end of the sleeve, a rim of the skirt forming a limit for a range of angular motion of the fixation element, and wherein the rim is slanted with respect to a center axis of the sleeve.
Dependencies are inferred from the claim text.