Spinal fixation plates

摘要

Spinal fixation plates for maintaining adjacent vertebrae in and fixed position are provided. In an exemplary embodiment, the plate includes opposed superior and inferior portions that are angled in a direction anterior to an anterior face of a mid-portion of the plate. The plate also includes a curvature formed therein about a longitudinal axis in a sagittal plane thereof. In use, when the plate is attached to adjacent vertebrae, the angle of the superior and inferior portions and the curvature in the plate are effective to position one or more thru-bores formed in the superior and inferior portions at the anterior rims of the adjacent vertebrae. In another embodiment, a spinal fixation plate is provided that is adapted to engage and mate to a fusion cage or other vertebral implant disposed between adjacent vertebra. The present invention also provides spinal fixation kits or assemblies, and methods for implanting the same.

主权项

1. A spinal fixation assembly, comprising:
a fusion cage having an anterior face and an opposite posterior face, and a superior face and an opposite inferior face, the fusion cage being configured to be positioned between adjacent vertebrae such that the superior face contacts an endplate of a superior vertebra and the inferior face contacts an endplate of an inferior vertebra; and a spinal fixation plate having
an anterior face and an opposite posterior face,at least one bone screw aperture extending through the anterior and posterior faces for receiving a bone screw configured to mate the spinal fixation plate to bone, the at least one bone screw aperture being obliquely angled relative to the posterior and anterior faces of the spinal fixation plate,a central opening being disposed substantially at a center of the spinal fixation plate, andfirst and second arms extending outward from the posterior face of the plate in a direction substantially perpendicular to the posterior face of the plate, the first and second arms being configured to slidably engage the fusion cage and hold the posterior face of the spinal fixation plate in contact with the anterior face of the fusion cage such that a portion of the cage is received between the first and second arms and such that the first and second arms extend across the superior and inferior faces of the fusion cage; and a screw that is received in the central opening of the spinal fixation plate.