Anterior impacted bone graft and driver instruments

Abstract

Instrument and implants are disclosed which provide for insertion of an implant into an intervertebral disc space from multiple approaches to the spine. Specifically, as a preferred aspect of the invention the implant includes a tapered portion and the implant may be inserted from multiple approaches to the spine with the orientation and taper properly oriented in the disc space regardless of the approach.

1 . A spinal implant for implanting into a disc space of a spine, comprising: 
 an implant body having three pairs of substantially parallel sidewalls constructed and arranged to permit insertion of said implant body into the disc space at least from a direct anterior approach to the spine and an oblique angle to the spine; and    wherein said implant body is tapered.    
   
   
       2 . The implant of  claim 1 , wherein said implant body has an upper anti-migration surface and a lower anti-migration surface adapted to minimize implant migration.  
   
   
       3 . The implant of  claim 1 , wherein: 
 said implant body is formed of bone; and    a portion of said implant body includes unmachined donor implant bone portion.    
   
   
       4 . The implant of  claim 1 , wherein said implant body has a first bore defined therein and a second bore defined therein parallelly spaced apart from said first bore, said second bore being adapted to receive a pin to minimize implant rotation.  
   
   
       5 . The implant of  claim 4 , wherein: 
 said implant body further includes an angled driving wall in which said second insertion tool bore is defined; and    said angled driving wall defines a recess surface that extends substantially perpendicular with respect to one of said pairs of sidewalls.    
   
   
       6 . The implant of  claim 4 , wherein said implant body defines a third bore parallelly spaced apart from said first bore, said third bore being smooth to receive a pin for minimizing implant rotation.  
   
   
       7 . The implant of  claim 1 , wherein said implant body has a central opening defined therein.  
   
   
       8 . The implant of  claim 7 , wherein said implant body is formed of bone having a medullary canal, and said central opening conforms generally to said medullary canal.  
   
   
       9 . The implant of  claim 1 , wherein a distance between each pair of said three pairs of sidewalls is the same.  
   
   
       10 . A spinal implant for implanting into a disc space of a spine, comprising: 
 an implant body having three pairs of substantially parallel sidewalls; and    wherein two of said three pairs of sidewalls are disposed at an oblique angle with respect to one another to permit insertion of said implant body into the disc space at least from a direct anterior approach to the spine and an oblique angle to the spine.    
   
   
       11 . The implant of  claim 10 , wherein said implant body is tapered.  
   
   
       12 . The implant of  claim 10 , wherein said implant body defines a first insertion tool bore and a second insertion tool bore, said first tool bore extending substantially parallel to one pair of said sidewalls, said second tool bore extending substantially parallel to another pair of said sidewalls.  
   
   
       13 . The implant of  claim 10 , wherein: 
 said implant body is formed of bone; and    a portion of said implant body includes an unmachined donor implant bone portion.    
   
   
       14 . The implant of  claim 13 , wherein said implant body has a central opening defined therein.  
   
   
       15 . The implant of  claim 14 , wherein said bone has a medullary canal, and said central opening conforms generally to said medullary canal.  
   
   
       16 . A spinal implant for implanting into a disc space of a spine, comprising: 
 an implant body having means for permitting insertion of said implant body into the disc space at least from a direct anterior approach to the spine and an oblique angle to the spine.    
   
   
       17 . The implant of  claim 16 , wherein: 
 said means for permitting insertion of said implant body includes three pairs of substantially parallel sidewalls; and    wherein two of said three pairs of sidewalls are disposed at an oblique angle with respect to one another.    
   
   
       18 . The implant of  claim 17 , wherein said means for permitting insertion of said implant body further includes a first tool insertion bore defined in said implant body and a second tool insertion bore defined in said implant body, said first tool bore extending substantially parallel to one of said three pairs sidewalls, said second tool bore extending substantially parallel to another of said three pairs sidewalls.  
   
   
       19 . The implant of  claim 16 , wherein said implant body is tapered.  
   
   
       20 . The implant of  claim 16 , wherein: 
 said implant body is formed of bone; and    a portion of said implant body includes unmachined donor implant bone portion.