Minimally invasive intervertebral staple distraction devices

摘要

Multiple, small, staple-like supports are inserted through a small tube into the disc space then rotated into position on the edge of the vertebral bodies. The tooth-like geometry of the proximal and distal faces of these staples mates with the outer edge of the vertebral body, extending past the front of the endplate anteriorly. The staples have teeth that dig into the endplate on the inside of the rim as well.

主权项

1. An intervertebral fusion cage, comprising:
a) an anterior wall having a width and a height, b) first and second side walls, each side wall extending posteriorly from the anterior wall to a posterior end, each side wall having a length, wherein an upper end portion of the anterior wall and each side wall form an upper bearing surface comprising teeth adapted for gripping an upper vertebral endplate, the upper bearing surface defining at least one upper opening therethrough adapted to promote bony fusion, wherein a lower end portion of the anterior wall and each side wall form a lower bearing surface comprising teeth adapted for gripping a lower vertebral endplate, the lower bearing surface defining at least one lower opening therethrough adapted to promote bony fusion, wherein the upper and lower openings together form a vertical throughole adapted to promote bony fusion, wherein the posterior ends of the sidewalls are not connected to each other posteriorly, wherein the height of the anterior wall is greater than the width of the anterior wall, and wherein the height of the anterior wall is greater than the length of each side wall.