Patent ID: 8083744
Filing Date: 2011-12-27
Classification: A61B,A61F

Abstract:
1. A method for sizing a fusion cage for insertion in a disc space between an upper vertebra and a lower vertebrae, comprising: determining a height of the disc space between unreamed endplates of the upper and lower vertebrae; sizing a fusion cage to include a body with a dimension between an upper bearing surface and a lower bearing surface that corresponds to the height of the disc space between the unreamed endplates of the upper and lower vertebrae; and providing the fusion cage with threads for threadingly engaging the fusion cage to the unreamed endplates of the upper and lower vertebrae to support the upper and lower vertebrae with the upper and lower bearing surfaces to maintain the height of the disc space without reaming the endplates of the upper and lower vertebrae, wherein the threads include a sharp crest, a concave trailing wall extending from the crest to the body, and a convex leading wall extending from the crest to the body.