Patent ID: 7192446
Filing Date: 2007-03-20
Classification: A61F

Abstract:
1. A fusion device for introduction in the space between adjacent vertebrae, comprising: an elongated body extending along a longitudinal axis thereof between a proximal end and a distal end, said body including an outer surface extending about said longitudinal axis, wherein said body includes opposing concave side walls extending therealong and an interior chamber; a thread pattern having at least one external thread formed on said outer surface, said thread pattern defining an advancing rotation direction from said distal end to said proximal end; and a thread cut out on said at least one external thread including an undercut in said thread below a crest of said external thread, said undercut forming a barb with a pointed end defined by said crest facing away from said advancing rotation direction and a wall extending from said pointed end into said external thread, wherein along said thread said wall is offset from a ray extending between said barb and a center of said body.