USRE38614EExpiredUtility

Intervertebral allograft spacer

79
Assignee: SYNTHES USAPriority: Jan 30, 1998Filed: Aug 22, 2002Granted: Oct 5, 2004
Est. expiryJan 30, 2018(expired)· nominal 20-yr term from priority
Inventors:David C. PaulHansjuerg EmchBeat Schenk
A61F 2002/30235A61F 2002/30237A61F 2002/3071A61F 2002/30367A61F 2002/30507A61F 2002/30327A61F 2002/3028A61F 2002/30126A61F 2002/2817A61F 2002/30354A61F 2002/4649A61F 2/3094A61F 2220/0066A61F 2002/30774A61F 2002/30112A61F 2230/0015A61F 2310/00293A61F 2002/3082A61F 2002/30158A61F 2002/30733A61F 2/30724A61F 2002/30494A61F 2/30744A61F 2002/30133A61F 2002/30975A61F 2002/30075A61F 2250/0039A61F 2002/2839A61F 2002/30011A61F 2250/0063A61F 2/30965A61F 2250/0089A61F 2002/30477A61F 2220/0033A61F 2002/30971A61F 2002/30772A61F 2220/005A61F 2220/0025A61F 2230/0065A61F 2002/30957A61F 2002/30057B29C 43/006A61F 2002/30062A61F 2230/0004A61F 2310/00353B29L 2031/3041A61F 2/30942A61F 2002/30153A61F 2002/30617A61F 2230/0019A61F 2310/00011A61F 2002/302A61F 2250/0023A61F 2230/0026B29C 33/26A61F 2002/30828A61F 2250/0097A61F 2002/30383A61F 2/4611A61F 2230/0008A61F 2002/30462A61F 2220/0041A61F 2002/30331A61F 2/28A61F 2002/30892A61F 2/4465A61F 2002/2835A61F 2002/4635A61F 2002/30433A61F 2002/30787A61F 2002/30782A61F 2002/30233A61F 2002/30604A61F 2002/30593A61F 2002/30785A61F 2002/30448A61F 2002/30492A61F 2002/30228A61F 2220/0075A61F 2230/0063A61F 2002/30894A61F 2/442A61F 2/447A61F 2250/0036A61F 2002/30841A61F 2002/30909A61F 2002/30329A61F 2210/0004A61F 2/4455A61F 2002/30387A61F 2002/30515A61F 2002/30481A61F 2002/30599A61F 2002/30324A61F 2310/00179A61F 2/4644A61F 2002/30904A61F 2230/0069A61F 2002/30843A61F 2002/30616A61F 2002/30459A61F 2210/0061
79
PatentIndex Score
79
Cited by
164
References
12
Claims

Abstract

An allogenic intervertebral implant for fusing vertebrae is disclosed. The implant is a piece of allogenic bone conforming in size and shape with a portion of an end plate of a vertebra. The implant has a wedge-shaped profile to restore disc height and the natural curvature of the spine. The top and bottom surfaces of the implant have a plurality of teeth to resist expulsion and provide initial stability. The implant according to the present invention provides initial stability need for fusion without stress shielding.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
       1. An intervertebral implant comprising a piece of allogenic bone conforming in size and shape with a portion of an end plate of a vertebra and having a wedge-shaped profile, wherein top and bottom surfaces of the implant have a plurality of teeth in combination with a discrete spacer comprising a piece of allogenic bone conforming in size and shape with a second portion of an end plate of a vertebra and having a wedge-shaped profile, wherein top and bottom surfaces of the second member  discrete spacer are substantially smooth and regions between top and bottom surfaces and anterior and lateral sides of the spacer have curved edges to facilitate implantation of the spacer. 
     
     
       2. The implant of  claim 1 , wherein at least one side has a channel for receiving a surgical instrument. 
     
     
       3. The implant of  claim 1 , wherein the channel runs in an anterior-posterior direction. 
     
     
       4. The implant of  claim 1 , wherein the teeth have a pyramid shape. 
     
     
       5. The implant of  claim 1 , wherein the teeth have a saw tooth shape. 
     
     
       6. The implant of  claim 1 , wherein at least one side of the implant has at least one hole for attachment of an inserter. 
     
     
       7. The implant of  claim 6 , wherein the at least one hole is threaded. 
     
     
       8. The implant of  claim 6 , wherein the at least one hole is provided in an anterior, posterior, posterior-lateral, or lateral side. 
     
     
       9. The implant of  claim 1 , wherein the top and bottom surfaces are defined by flat planar surfaces. 
     
     
       10. The implant of  claim 9 , wherein a region between the top and bottom surfaces and an anterior side of the implant is a curved edge to facilitate implantation of the implant. 
     
     
       11. The implant of  claim 1 , wherein the top and bottom surfaces are defined by curved surfaces, said curved surfaces contoured to mimic surfaces of the end plates of the vertebrae. 
     
     
       12. The implant of  claim 1 , wherein the implant has an interior space for receiving an osteoconductive material.

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