| 摘要 |
A guard for use in performing surgery across a disc space between two adjacent vertebral bodies is described. The guard comprises an elongated body having a proximal end and an opposite distal end for placement against the adjacent vertebral bodies. The guard has a first passage through said elongated body for providing protected access to the disc space and the adjacent vertebral bodies for forming therein a first bore having a radius, and a second passage through said elongated body for providing protected access to the disc space and the adjacent vertebral bodies for forming therein a second bore having a radius. Each of the first and second passages have a central longitudinal axis, the longitudinal axes being spaced from each other greater than the sum of the radius of the first bore and the radius of the second bore. <IMAGE> |
