Intervertebral fusion implant

Abstract

The present invention provides an intervertebral implant for implantation in a treated area of an intervertebral space between vertebral bodies of a spine. The implant includes a spacer portion having an inferior and superior surface, wherein the inferior and superior surfaces each have a contact area capable of engaging with anatomy in the treated area, and the inferior and superior surfaces define a through-hole extending through the spacer body. The present invention further provides screw holes extending from a side portion to the inferior and superior surfaces of the spacer portion and a plate portion rigidly coupled to the spacer portion through a coupling means, wherein the plate portion contains screws holes for receiving screws. A screw back out prevention mechanism adapted on the plate portion and prevents the back out of screws from the screw holes.

What is claimed is: 
     
         1 . An intervertebral implant for implantation in a treated area of an intervertebral space between vertebral bodies of a spine, wherein said implant comprises:
 a spacer portion having an inferior and superior surface, wherein the inferior and superior surfaces each have a contact area capable of engaging with anatomy in the treated area, and the inferior and superior surfaces define a through-hole extending through the spacer body;   screw holes extending from a side portion to the inferior and superior surfaces of the spacer portion;   a plate portion rigidly coupled to the spacer portion through a coupling means, wherein the plate portion contains screws holes for receiving screws; and   a screw back out prevention mechanism adapted on the plate portion and prevents the back out of screws from the screw holes,   wherein the plate portion further comprises torsional stabilizers on an upper and lower portions of the plate portion   wherein the spacer portion has a length that is greater than the width of the plate portion.   
     
     
         2 . The intervertebral implant of  claim 1 , wherein the at least two screws are inserted into adjacent vertebral bodies at divergent angles. 
     
     
         3 . The intervertebral implant of  claim 1 , wherein the coupling means is at least one pin that rigidly couples the spacer portion and the plate portion of the intervertebral implant. 
     
     
         4 . The intervertebral implant of  claim 1 , wherein the plate portion and the spacer portion are configured to structural mate with one another. 
     
     
         5 . The intervertebral implant of  claim 1 , wherein the plate portion is substantially flush with the body. 
     
     
         6 . The intervertebral implant of  claim 1 , wherein the plate portion is comprised of metal. 
     
     
         7 . The intervertebral implant of  claim 6 , wherein the metal is comprised of titanium. 
     
     
         8 . The intervertebral implant of  claim 1 , wherein the spacer portion is comprised of plastic. 
     
     
         9 . The intervertebral implant of  claim 1 , wherein the torsional stabilizers are sharp edged protrusions. 
     
     
         10 . The intervertebral implant of  claim 1 , wherein the through-hole is configured to receive bone graft material. 
     
     
         11 . An intervertebral implant for implantation in a treated area of an intervertebral space between vertebral bodies of a spine, wherein said implant comprises:
 a spacer portion having an inferior and superior surface, wherein the inferior and superior surfaces each have a contact area capable of engaging with anatomy in the treated area;   at least two holes, wherein each hole is configured to receive a fastener to fasten the implant to the vertebral bodies; and   a plate portion rigidly coupled to the spacer portion through a coupling means;   wherein the plate portion further comprises torsional stabilizers on an upper and lower portions of the plate portion.   
     
     
         12 . The intervertebral implant of  claim 11 , wherein the at least two holes are configured to position the fasteners at divergent angles into adjacent vertebral bodies. 
     
     
         13 . The intervertebral implant of  claim 11 , wherein the coupling means is at least one pin that rigidly couples the spacer portion and the plate portion of the intervertebral implant. 
     
     
         14 . The intervertebral implant of  claim 11 , wherein the plate portion and the spacer portion are configured to structural mate with one another. 
     
     
         15 . The intervertebral implant of  claim 11 , wherein the plate portion is substantially flush with the body. 
     
     
         16 . The intervertebral implant of  claim 11 , wherein the plate portion is comprised of metal. 
     
     
         17 . The intervertebral implant of  claim 16 , wherein the metal is comprised of titanium. 
     
     
         18 . The intervertebral implant of  claim 11 , wherein the spacer portion is comprised of plastic. 
     
     
         19 . The intervertebral implant of  claim 11 , wherein the torsional stabilizers are sharp edged protrusions. 
     
     
         20 . The intervertebral implant of  claim 11 , wherein the through-hole is configured to receive bone graft material.