US2004143330A1PendingUtilityA1

Intervertebral cage and method of use

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Assignee: DEPUY ACROMED INCPriority: Dec 23, 1999Filed: Sep 4, 2003Published: Jul 22, 2004
Est. expiryDec 23, 2019(expired)· nominal 20-yr term from priority
Inventors:John Anthony Sazy
A61F 2002/30593A61B 17/701A61F 2230/0015A61F 2/4465A61F 2002/30616A61B 17/7032A61F 2230/0063A61F 2/442A61F 2002/30787A61F 2310/00023A61F 2002/30133A61F 2/30965A61F 2002/2835A61F 2002/30308Y10S623/902A61F 2310/00017
42
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Claims

Abstract

An intervertebral prosthesis for implantation between adjacent vertebrae of the human spine is shown. The prosthesis is formed as a unitary cage body configured and sized to be inserted between adjacent vertebrae in a single step implantation procedure. The cage body is banana shaped as viewed from above, the body having an exterior surface and an interior surface, the interior surface defining an internal recess for receiving cancellous bone material during an implantation procedure. The cage body can be formed as an interlinked mesh.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . An intervertebral prosthesis for implantation between adjacent vertebrae of the human spine, comprising: 
 a unitary body that is banana-shaped as viewed from above, the body having an exterior surface and an interior surface, the interior surface defining an interior recess; and    wherein the unitary body includes upper and lower edges that each form smoothly-sloping surfaces.    
     
     
         2 . The intervertebral prosthesis of  claim 1 , wherein the banana shape of the unitary body includes a front arc that has a first radius of curvature and a back arc that includes a second radius of curvature.  
     
     
         3 . The intervertebral prosthesis of  claim 2 , wherein the first radius of curvature is equal to or less than the second radius of curvature.  
     
     
         4 . The intervertebral prosthesis of  claim 3 , wherein the first radius of curvature is equal to the second radius of curvature.  
     
     
         5 . The intervertebral prosthesis of  claim 3 , wherein the first radius of curvature is less than the second radius of curvature.  
     
     
         6 . The intervertebral prosthesis of  claim 5 , wherein the first and the second radii of curvature extend from a single point of rotation.  
     
     
         7 . The intervertebral prosthesis of  claim 2 , wherein the unitary body defines openings about a circumference of the body.  
     
     
         8 . The intervertebral prosthesis of  claim 7 , wherein the openings are evenly spaced about the circumference of the body.  
     
     
         9 . The intervertebral prosthesis of  claim 8 , wherein the upper and lower edges include bands that form a serpentine arrangement of an interlinked mesh.  
     
     
         10 . The intervertebral prosthesis of  claim 8 , wherein the defined openings are quadrilaterals.  
     
     
         11 . The intervertebral prosthesis of  claim 8 , wherein the quadrilaterals are parallelograms.  
     
     
         12 . The intervertebral prosthesis of  claim 8 , wherein the parallelograms are rhombuses.  
     
     
         13 . The intervertebral prosthesis of  claim 8 , wherein the intervertebral prosthesis includes at least one material selected from the group consisting of a metal, a carbon fiber, and a polymer.  
     
     
         14 . The intervertebral prosthesis of  claim 13 , wherein the intervertebral prosthesis includes a metal.  
     
     
         15 . The intervertebral prosthesis of  claim 14 , wherein the metal includes at least one member selected from the group consisting of titanium and metal alloy.  
     
     
         16 . The intervertebral prosthesis of  claim 15 , wherein the metal includes a metal alloy.  
     
     
         17 . The intervertebral prosthesis of  claim 16 , wherein the metal alloy is a stainless steel.  
     
     
         18 . The intervertebral prosthesis of  claim 13 , wherein the intervertebral prosthesis includes a carbon fiber.  
     
     
         19 . The intervertebral prosthesis of  claim 13 , wherein the intervertebral prosthesis includes a polymer.  
     
     
         20 . The intervertebral prosthesis of  claim 19 , wherein the polymer is a bioreabsorbable polymer.  
     
     
         21 . The intervertebral prosthesis of  claim 20 , wherein the bioreabsorbable polymer includes at least one member selected from the group consisting of polyglycotic acid and polylactic acid.  
     
     
         22 . The intervertebral prosthesis of  claim 19 , wherein the polymer includes polymethylmethacylates.  
     
     
         23 . The intervertebral prosthesis of  claim 22 , wherein the polymethylmethacylate is blended with an antibiotic.  
     
     
         24 . The intervertebral prosthesis of  claim 13 , wherein the intervertebral prosthesis has a width in a range of between about 24 mm and about 28 mm.  
     
     
         25 . The intervertebral prosthesis of  claim 24 , wherein the intervertebral prosthesis has a length in a range of between about 8 mm and about 10 mm.  
     
     
         26 . The intervertebral prosthesis of  claim 25 , wherein the intervertebral prosthesis has a height in a range of between about 10 mm and about 16 mm.  
     
     
         27 . The intervertebral prosthesis of  claim 26 , wherein the front arc of the prosthesis has a thickness in a range of between about 1.5 mm and about 2 mm.  
     
     
         28 . The intervertebral prosthesis of  claim 2 , wherein the front arc and the back arc are continuous.

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