Highly lordosed fusion cage

Abstract

A fusion cage has a first component that defines an outside surface that is configured to engage a vertebral endplate, and an interior surface. The fusion cage has a second component that defines first and second opposed surfaces. One of the first and second opposed surfaces can mate with the interior surface of the first component. The fusion cage can include vertical and lateral throughholes adapted to enhance fusion.

1 . (canceled) 
     
     
         2 . A vertebral implant configured to be inserted into an intervertebral disc space between first and second vertebrae in an insertion direction, the implant comprising:
 a leading end and a trailing end opposite the leading end, wherein the leading end is spaced from the trailing end in the insertion direction;   an upper vertebral facing surface configured to face the first vertebral endplate; and   a lower vertebral facing surface of the implant body that is opposite the upper vertebral facing surface along a second direction that is perpendicular to the insertion direction, the lower vertebral facing surface configured to face the second vertebral endplate,   wherein the implant defines an elongate recess that is disposed between the upper and lower vertebral facing surfaces with respect to the second direction, the recess is elongate along a longitudinal recess axis, and the longitudinal recess axis and the lower vertebral facing surface define a recess angle that corresponds to an angle of the intervertebral disc space.   
     
     
         3 . The vertebral implant of  claim 2 , wherein the recess angle is about 15 degrees. 
     
     
         4 . The vertebral implant of  claim 2 , wherein the implant defines a wall that extends between the first and second vertebral facing surfaces with respect to the second direction, and the recess extends into the wall. 
     
     
         5 . The vertebral implant of  claim 4 , wherein the recess angle is about 15 degrees. 
     
     
         6 . The vertebral implant of  claim 2 , wherein the recess extends into the implant in a direction that is perpendicular to the insertion direction. 
     
     
         7 . The vertebral implant of  claim 2 , wherein the longitudinal recess axis is defined at an outer surface of the implant. 
     
     
         8 . The vertebral implant of  claim 7 , wherein the longitudinal recess axis bisects the recess at the outer surface. 
     
     
         9 . The vertebral implant of  claim 7 , wherein the recess extends into the implant in a direction that is perpendicular to the insertion direction. 
     
     
         10 . The vertebral implant of  claim 9 , wherein the recess angle is about 15 degrees. 
     
     
         11 . The vertebral implant of  claim 2 , wherein the insertion direction and the lower vertebral facing surface define a respective angle that corresponds to the angle of the intervertebral space. 
     
     
         12 . The vertebral implant of  claim 11 , wherein the respective angle is about 15 degrees. 
     
     
         13 . The vertebral implant of  claim 2 , wherein the upper vertebral facing surface comprises an upper gripping surface adapted to grip the first vertebral endplate. 
     
     
         14 . The vertebral implant of  claim 13 , wherein the lower vertebral facing surface comprises a lower gripping surface adapted to grip the second vertebral endplate: 
     
     
         15 . The vertebral implant of  claim 2 , further comprising a throughhole that extends from the upper vertebral facing surface to the lower vertebral facing surface along the second direction. 
     
     
         16 . The vertebral implant of  claim 2 , wherein the leading end comprises a leading wall anteriorly connecting the first and second vertebral facing surfaces, and the trailing end comprises a trailing end wall posteriorly connecting the first and second gripping surfaces. 
     
     
         17 . A vertebral implant configured to be inserted into an intervertebral disc space between first and second vertebrae in an insertion direction, the implant comprising:
 a leading end and a trailing end opposite the leading end, wherein the leading end is spaced from the trailing end in the insertion direction;   an upper vertebral facing surface configured to face the first vertebral endplate; and   a lower vertebral facing surface of the implant body that is opposite the upper vertebral facing surface along a second direction that is perpendicular to the insertion direction, the lower vertebral facing surface configured to face the second vertebral endplate, wherein the implant defines an elongate recess that is disposed between the upper and lower vertebral facing surfaces with respect to the second direction, the recess is elongate along a longitudinal recess axis, and the longitudinal recess axis and the lower vertebral facing surface define a recess angle of about 15 degrees.   
     
     
         18 . The vertebral implant of  claim 17 , wherein the implant defines a wall that extends between the first and second vertebral facing surfaces with respect to the second direction, and the recess extends into the wall. 
     
     
         19 . The vertebral implant of  claim 17 , wherein the recess extends into the implant in a direction that is perpendicular to the insertion direction. 
     
     
         20 . The vertebral implant of  claim 17 , wherein the longitudinal recess axis is defined at an outer surface of the implant. 
     
     
         21 . The vertebral implant of  claim 20 , wherein the longitudinal recess axis bisects the recess at the outer surface. 
     
     
         22 . The vertebral implant of  claim 20 , wherein the recess extends into the implant in a direction that is perpendicular to the insertion direction. 
     
     
         23 . The vertebral implant of  claim 17 , wherein the insertion direction and the lower vertebral facing surface define a respective angle of about 15 degrees. 
     
     
         24 . The vertebral implant of  claim 17 , wherein the upper vertebral facing surface comprises an upper gripping surface adapted to grip the first vertebral endplate, and the lower vertebral facing surface comprises a lower gripping surface adapted to grip the second vertebral endplate: 
     
     
         25 . The vertebral implant of  claim 17 , further comprising a throughhole that extends from the upper vertebral facing surface to the lower vertebral facing surface along the second direction. 
     
     
         26 . The vertebral implant of  claim 21 , wherein the leading end comprises a leading wall anteriorly connecting the first and second vertebral facing surfaces, and the trailing end comprises a trailing end wall posteriorly connecting the first and second gripping surfaces.