Patent ID: 7534265
Filing Date: 2009-05-19
Classification: A61F

Abstract:
1. An interbody fusion spacer, comprising: an elongated generally cylindrical body having a length and an outer circumferential surface defining an outer circumference, a first end wall, a second end wall and a side wall cooperating to define an interior chamber; at least one of said first end wall and said second end wall having an end wall discontinuity; a side wall discontinuity extending along at least about 50% of the length of said body and aligned with the end wall discontinuity and configured for nesting with an adjacent spacer; and said side wall discontinuity defining a side wall opening to said interior chamber, said side wall opening sized to extend over at least about 20% of the outer circumference of said body and along at least about 50% of the length of said body to provide said side wall opening with a size sufficient for loading osteogenic material into said interior chamber; and said side wall defining a plurality of secondary bone ingrowth openings extending through said outer circumferential surface and into said interior chamber to facilitate bone ingrowth into said interior chamber, said plurality of secondary bone ingrowth openings sized smaller than said side wall opening.