Double bundle acl repair system

Abstract

A system for single tunnel, double bundle anterior cruciate ligament reconstruction includes implant constructs and instruments. The implant constructs provide a combination of cortical fixation and bone tunnel aperture fixation. The implant constructs separate a graft into distinct bundles. The instruments are used to prepare shaped bone tunnels to receive the implant constructs and graft bundles. Methods for reconstructing the antero-medial and postero-lateral bundles of the anterior cruciate ligament may rely on single femoral and tibial tunnels and a single strand of graft.

1 . A system for preparing a joint for securing a graft in a bone tunnel, the system comprising;
 an instrument comprising:   a handle with a first diameter;   a shaft with a second diameter smaller than the first diameter, wherein the shaft extends at least partially between a leading end and a trailing end along an axis, wherein the handle extends from the trailing end;   a boss extending along the axis from the leading end, wherein the boss comprises a width and a height transverse to the width, wherein the height is less than the width, wherein the width and height are non-parallel to the axis.   
     
     
         2 . The system of  claim 1 , wherein the boss comprises a first indentation and a second indentation extending parallel to the axis. 
     
     
         3 . The system of  claim 2 , wherein the first indentation and second indentation are on opposite sides of the boss and divide the width of the boss into a plurality of lobes. 
     
     
         4 . The system of  claim 3 , wherein the plurality of lobes comprise a first lobe and a second lobe. 
     
     
         5 . The system of  claim 4 , wherein the first lobe and the second lobe are the same length. 
     
     
         6 . The system of  claim 5 , wherein the boss comprises a central hole. 
     
     
         7 . The system of  claim 6 , wherein the shaft comprises a shaft hole extending from the leading end to the trailing end along the axis, wherein the shaft hole is coaxial with the central hole. 
     
     
         8 . The system of  claim 7 , wherein the handle comprises a handle hole extending entirely through the handle along the axis, wherein the handle hole is coaxial with the central hole and the shaft hole, wherein the handle comprises a strike platform. 
     
     
         9 . A system for preparing a joint for securing a graft in a bone tunnel, the system comprising;
 an instrument comprising:   a handle with a first diameter;   a shaft with a second diameter smaller than the first diameter, wherein the shaft extends at least partially between a leading end and a trailing end along an axis, wherein the handle extends from the trailing end;   a boss extending along the axis from the leading end, wherein the boss comprises a first lobe and a second lobe, wherein one of the first or second lobes comprises a length greater than one of the other of the first or second lobes.   
     
     
         10 . The system of  claim 9 , wherein the boss comprises a width and a height, wherein the height is less than the width, wherein the width and height are non-parallel to the axis. 
     
     
         11 . The system of  claim 10 , wherein the boss comprises a first indentation and a second indentation extending parallel to the axis. 
     
     
         12 . The system of  claim 11 , wherein the first indentation and second indentation are on opposite sides of the boss and divide the width of the boss into the first and second lobes. 
     
     
         13 . The system of  claim 12 , wherein the boss comprises a central hole. 
     
     
         14 . The system of  claim 13 , wherein the shaft comprises a shaft hole extending from the leading end to the trailing end along the axis, wherein the shaft hole is coaxial with the central hole. 
     
     
         15 . The system of  claim 14 , wherein the handle comprises a handle hole extending entirely through the handle along the axis, wherein the handle hole is coaxial with the central hole and the shaft hole, wherein the handle comprises a strike platform. 
     
     
         16 . A system for preparing a joint for securing a graft in a bone tunnel, the system comprising;
 an instrument comprising:   a handle with a first diameter;   a shaft with a second diameter smaller than the first diameter, wherein the shaft extends at least partially between a leading end and a trailing end along an axis, wherein the handle extends from the trailing end;   a boss extending along the axis from the leading end, wherein the boss comprises a width and a height, wherein the height is less than the width, wherein the width and height are non-parallel to the axis, wherein the boss comprises a tip extending from the boss, wherein the tip width is less than the boss width.   
     
     
         17 . The system of  claim 16 , wherein the boss and the tip comprise a first indentation and a second indentation extending along the length of the boss and the tip and parallel to the axis. 
     
     
         18 . The system of  claim 17 , wherein the first indentation and second indentation are on opposite sides of the boss and divide the width of the boss into a first lobe and a second lobe. 
     
     
         19 . The system of  claim 18 , wherein one of the first or second lobes comprises a length greater than one of the other of the first or second lobe. 
     
     
         20 . The system of  claim 18 , wherein the first lobe and the second lobe are the same length.