Modular Reaming System for Femoral Revision

Abstract

A modular reaming system for reaming a plurality of pockets in an anatomical feature extends along a longitudinal axis. The system includes a first reamer in a first position on the longitudinal axis, and the first reamer reams a first pocket in the anatomical feature. The system further includes a second reamer that is removably coupled to the first reamer in a second position on the longitudinal axis. The second reamer reams a second pocket in the anatomical feature. The second reamer is keyed against rotation relative to the first reamer to ream the first and second pockets substantially simultaneously.

1 . A modular reaming system for reaming a plurality of pockets in an anatomical feature, the modular reaming system extending along a longitudinal axis, the modular reaming system comprising:
 a first reamer in a first position on the longitudinal axis, the first reamer reaming a first pocket in the anatomical feature;   a second reamer that is removably coupled to the first reamer in a second position on the longitudinal axis, the second reamer reaming a second pocket in the anatomical feature, the second reamer keyed against rotation relative to the first reamer to ream the first and second pockets substantially simultaneously.   
     
     
         2 . The modular reaming system of  claim 1 , further comprising a shaft that is fixedly coupled to the first reamer, the shaft being received by the second reamer to removably couple the second reamer to the first reamer. 
     
     
         3 . The modular reaming system of  claim 2 , wherein the shaft includes a shoulder that limits movement of the second reamer along the longitudinal axis. 
     
     
         4 . The modular reaming system of  claim 2 , wherein the first reamer has a maximum width that is less than a maximum width of the second reamer, wherein the first reamer is disposed at a distal end of the shaft, and wherein the second reamer is disposed between the distal end and a proximal end of the shaft. 
     
     
         5 . The modular reaming system of  claim 2 , wherein the shaft includes at least one biased detent button that is removably received by an aperture of the second reamer, the biased detent button removably fixing the second reamer in the second position. 
     
     
         6 . The modular reaming system of  claim 1 , further comprising a spacer that is disposed between the first reamer and the second reamer and that maintains an amount of space between the first and second reamers. 
     
     
         7 . The modular reaming system of  claim 1 , further comprising a third reamer that is disposed between the first reamer and the second reamer at a third position on the longitudinal axis, the third reamer reaming a third pocket, the third reamer keyed against rotation relative to the first reamer to ream the first, second, and third pockets substantially simultaneously. 
     
     
         8 . The modular reaming system of  claim 1 , further comprising a first surface that is fixed relative to the first reamer and a corresponding second surface that is fixed relative to the second reamer, the second surface mating with the first surface to key the second reamer against rotation relative to the first reamer. 
     
     
         9 . The modular reaming system of  claim 8 , wherein the first and second surfaces are flat. 
     
     
         10 . The modular reaming system of  claim 1 , further comprising a drive coupler that is coupled to the first and second reamers to drivingly rotate the first and second reamers in a same direction about the longitudinal axis to ream the first and second pockets substantially simultaneously while rotating in the same direction. 
     
     
         11 . The modular reaming system of  claim 10 , further comprising a first drive coupler that is fixedly coupled to the first reamer and a second drive coupler that is fixedly coupled to the second reamer, the second reamer receiving the first drive coupler. 
     
     
         12 . The modular reaming system of  claim 1 , wherein the first reamer is fluted in a first direction about the longitudinal axis, and the second reamer is fluted in the first direction about the longitudinal axis to ream the first and second pockets substantially simultaneously. 
     
     
         13 . The modular reaming system of  claim 1 , further comprising a retention member that limits movement of the second reamer axially away from the first reamer along the longitudinal axis. 
     
     
         14 . The modular reaming system of  claim 1 , further comprising a first shaft fixed to an end of the first reamer and a second shaft fixed to an end of the second reamer, the second shaft and the second reamer receiving the first shaft to removably couple the first and second reamers. 
     
     
         15 . The modular reaming system of  claim 1 , wherein the first reamer performs distal reaming in a femur of a patient, and wherein the second reamer simultaneously performs proximal reaming in the femur of the patient. 
     
     
         16 . A modular reaming system comprising:
 a first drive coupler;   a second drive coupler;   a first reamer driven in rotation by the first drive coupler; and   a second reamer driven in rotation by the second drive coupler or driven in rotation by the first drive coupler.   
     
     
         17 . The modular reaming system of  claim 16 , wherein the first and second reamers are keyed against rotation relative to each other. 
     
     
         18 . The modular reaming system of  claim 16 , further comprising a shaft, the first reamer fixed to a distal end of the shaft, the first drive coupler fixed to a proximal end of the shaft, the second reamer receiving the shaft to couple to the shaft. 
     
     
         19 . The modular reaming system of  claim 18 , wherein the second reamer slideably receives the shaft. 
     
     
         20 . The modular reaming system of  claim 16 , further comprising a first shaft and a second shaft, the first shaft including the first reamer on a distal end of the first shaft and the first drive coupler on a proximal end of the first shaft, the second shaft including the second reamer on a distal end of the second shaft and the second drive coupler on a proximal end of the second shaft, the first reamer and the first shaft receiving the second drive coupler and the second shaft. 
     
     
         21 . The modular reaming system of  claim 16 , wherein one of the first and second reamers performs distal reaming in a femur of a patient, and the other of the first and second reamers performs proximal reaming in the femur of the patient. 
     
     
         22 . The modular reaming system of  claim 16 , further comprising an extension member that is removably coupled to the second reamer, the extension member including a third drive coupler. 
     
     
         23 . A method of reaming a femur comprising:
 removably coupling a proximal reamer to a shaft fixed to a distal reamer and retaining the proximal reamer against rotation relative to the distal reamer;   rotating the shaft in a single direction to substantially simultaneously ream a proximal pocket in the femur with the proximal reamer and a distal pocket in the femur with the distal reamer.   
     
     
         24 . The method of  claim 23 , wherein removably coupling the proximal reamer to the shaft comprises sliding the proximal reamer onto the shaft toward the distal reamer. 
     
     
         25 . The method of  claim 24 , further comprising retaining the proximal reamer in a fixed axial position on the shaft. 
     
     
         26 . The method of  claim 23 , further comprising visually indicating a depth of the proximal and distal reamers in the femur. 
     
     
         27 . The method of  claim 23 , further comprising removably coupling an intermediate reamer to the shaft between the proximal and distal reamers and rotating the shaft in the single direction to substantially simultaneously ream the proximal pocket with the proximal reamer, the distal pocket with the distal reamer, and an intermediate pocket with the intermediate reamer. 
     
     
         28 . A reaming system that reams a femur for implantation of a femoral component of a prosthetic joint, the reaming system comprising:
 a distal member extending along a longitudinal axis, the distal member including a first shaft, a distal reamer, and a first drive coupler, the distal reamer and the first drive coupler fixed to opposite ends of the first shaft, the distal reamer reaming a distal pocket in the femur, the first shaft including a first flat surface;   a proximal member including a second shaft, a proximal reamer, and a second drive coupler, the proximal reamer and the second drive coupler fixed to opposite ends of the second shaft, the proximal reamer reaming a proximal pocket in the femur, the second shaft including a second flat surface, the proximal member removably receiving the first drive coupler and the first shaft to removably couple the proximal and distal members, the distal reamer extending out of the proximal member, the first flat surface mating with the second flat surface to couple the distal member and the proximal member against rotation relative to each other to ream the first and second pockets substantially simultaneously; and   a retention member that limits movement of the proximal member axially relative to the distal member.   
     
     
         29 . A modular reaming system for reaming a plurality of pockets in an anatomical feature, the modular reaming system including a longitudinal axis, the modular reaming system comprising:
 a first reamer in a first position on the longitudinal axis, the first reamer reaming a first pocket in the anatomical feature;   a second reamer that is removably coupled to the first reamer in a second position on the longitudinal axis, the second reamer reaming a second pocket in the anatomical feature; and   a means for coupling the second reamer against rotation relative to the first reamer to ream the first and second pockets substantially simultaneously.   
     
     
         30 . A modular reaming system for reaming a plurality of pockets in an anatomical feature, the modular reaming system including a longitudinal axis, the modular reaming system comprising:
 a first member with a first reamer that reams a first pocket in the anatomical feature, the first member including a first surface;   a second member with a second reamer that reams a second pocket in the anatomical feature, the second reamer being removably coupled to the first member, the second member including a second surface that is complementary to the first surface so that rotation of one of the first and second members about the longitudinal axis causes rotation of the other of the first and second members for substantially simultaneous formation of the first and second pockets.   
     
     
         31 . The modular reaming system of  claim 30 , wherein the first surface is flat, and the second surface is flat. 
     
     
         32 . The modular reaming system of  claim 30 , wherein the first member includes a shaft, wherein the first reamer is fixed to the shaft, and wherein the second member axially receives the shaft to removably couple the first and second members. 
     
     
         33 . The modular reaming system of  claim 32 , wherein the first member slidably receives the shaft to removably couple the first and second members. 
     
     
         34 . The modular reaming system of  claim 30 , wherein the first member includes a first shaft, wherein the first reamer is fixed to a distal end of the first shaft, wherein a first drive coupler is fixed to a proximal end of the first shaft, wherein the second member includes a second shaft, wherein the second reamer is fixed to a distal end of the second shaft, wherein a second drive coupler is fixed to a proximal end of the second shaft, and wherein the second reamer receives the first drive coupler and the first shaft to removably couple the first and second members.