Prosthetic Spinal Disc Replacement and Methods Thereof

摘要

The present invention relates generally to a prosthetic spinal disc for replacing a damaged disc between two vertebrae of a spine and methods for inserting said discs. The intervertebral prosthetic discs are provided with connections for facilitating implantation and removal and features which enhance primary and secondary stability over time.

主权项

1. An intervertebral prosthetic disc comprising:
a first endplate having a first surface configured to substantially engage with a first vertebral body and a second surface comprising an articulating surface configured to allow for relative movement of the first endplate; a second endplate having a first surface configured to substantially engage with a second vertebral body and a second surface comprising an articulating surface configured to allow for relative movement of the second endplate; wherein the first surface of the first endplate has a first keel configured to engage with a groove in the first vertebral body, the first keel having a first trailing surface with a first opening extending therethrough, the first opening including a first bore hole having a first longitudinal axis and a first curved cutout extending obliquely relative to the first longitudinal axis; the first surface of the second endplate has a second keel configured to engage with a groove in the second vertebral body, the second keel having a second trailing surface with a second opening extending therethrough, the second opening including a second bore hole having a second longitudinal axis and a second curved cutout extending obliquely from the second longitudinal axis; wherein the first and second curved cutouts are configured to receive a first retaining feature and the first and second bore holes are configured to receive a second retaining feature; wherein at least one of the first and second keels has at least one slot extending a length downwardly from a distal edge of the keel to the base of the keel, and wherein the at least one of the first and second keels includes a leading edge that includes a chamfer for aligning and inserting the keel into the groove in the first and second vertebral body.