Revision connector for spinal constructs

摘要

An extender system is configured to couple a vertebral bone anchor that has been previously implanted in a vertebra, or is newly implantable in a vertebra, to an adjacent bone, which can be an additional spinal level or an occiput, for example. The extender system includes an extension member having a body and an engagement member coupled to the body. The extension member defines an aperture extending through the engagement member. A screw is configured to attach the extension member to the vertebral bone anchor. The extension member can be fastened to the adjacent bone.

主权项

1. An extender system configured to be operatively coupled to a vertebral implant that is secured to a vertebra, the vertebral implant including a first bone anchor and a first anchor seat that receives the first bone anchor, the extender system comprising:
an extension member that defines an aperture; a bushing disposed in the aperture; a fastener configured to couple the extension member to the first anchor seat, the fastener defining a distal portion that is configured to threadedly engage the first anchor seat so as to capture a spinal fixation rod disposed within the first anchor seat, and thereby fix the position of the first bone anchor relative to the first anchor seat and the spinal fixation rod; and a second bone anchor configured to attach the extension member to an underlying bone disposed adjacent the vertebra, wherein the extension member is polyaxially pivotable relative to the bushing.