Spinal implant device with fusion cage and fixation plates and method of implanting

Abstract

There is provided a spinal implant device for placement between adjacent spinous processes and a pair of opposing facet joints. The spinal implant device includes a fusion cage, first and second fixation plates and a connector for connecting the cage to the plates. The fusion cage includes a superficial face, a deep face, superior and inferior saddle portions, and opposing cage ends. Each cage end defining a facet fusion surface sized and configured to respectively contact the opposing facet joints. The first and second fixation plate are sized and configured to extend along and in contact with the adjacent spinous processes. A method of implanting the device is provided. In another embodiment the device includes the fusion cage.

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         47 . A spinal implant device for placement between adjacent spinous processes and adjacent a thecal sac, the spinous processes including a superior spinous process extending to a superior spinolaminar junction and an inferior spinous process extending to the inferior spinolaminar junction, the spinous processes disposed about a pair of opposing facet joints, the spinal implant device comprising:
 a fusion cage including:
 a superficial face defining an interspinous surface; 
 a deep face defining a thecal sac surface disposable adjacent the thecal Sac; 
 a superior saddle portion defining a superior interlaminar fusion surface disposed between the superficial and deep faces, the superior saddle portion sized and configured to receive the superior spinolaminar junction; 
 an inferior saddle portion defining an inferior interlaminar fusion surface disposed between the superficial and deep faces, the inferior saddle portion sized and configured to receive the inferior spinolaminar junction; and 
 opposing cage ends, each cage end defining a facet fusion surface disposed between the superior and inferior interlaminar fusion surfaces, the facet fusion surfaces sized and configured to respectively contact the opposing facet joints. 
   
     
     
         48 . The spinal implant device of  claim 47  wherein the cage includes a cage recess. 
     
     
         49 . The spinal implant device of  claim 48  wherein the superior interlaminar fusion surface includes a superior opening extending to the cage recess, the inferior interlaminar fusion surface includes an inferior opening extending to the cage recess. 
     
     
         50 . The spinal implant device of  claim 48  wherein each of the facet fusion surfaces includes a facet opening extending to the cage recess. 
     
     
         51 . The spinal implant device of  claim 48  wherein the interspinous surface includes interspinous openings therein extending to the cage recess. 
     
     
         52 . The spinal implant device of  claim 47  wherein the superior and inferior interlaminar fusion surfaces are concave shaped. 
     
     
         53 . The spinal implant device of  claim 47  wherein the facet fusion surfaces are convex shaped. 
     
     
         54 . The spinal implant device of  claim 47  wherein the interspinous surface is generally planar. 
     
     
         55 . The spinal implant device of  claim 47  wherein the thecal sac surface is concave. 
     
     
         56 . The spinal implant device of  claim 47  wherein the thecal sac surface defines a continuously smooth surface.