Femoral reamings system and method of performing trial reduction

Abstract

An apparatus for removing bone material including a distal cutting instrument and a proximal cutting instrument. The distal cutting instrument has at least one first cutting edge, a shoulder, and a shaft portion. The shaft portion has an anti-rotation feature. The at least one first cutting edge removes bone material when moved in a first direction. The proximal cutting instrument is removably attached to the shaft portion, and has a first end portion and a second end portion. The second end portion contacts the shoulder of the distal reamer when the proximal reamer is mounted to the shaft portion. The proximal reamer has at least one second cutting edge and an aperture. The aperture is adapted to receive the anti-rotation feature of the shaft portion of the distal reamer. The at least one second cutting edge removes bone material when moved in a second direction.

1 .- 15 . (canceled) 
     
     
         16 . A system for preparing a long bone for a prosthetic, the long bone having a long axis, the system comprising:
 a distal reamer configured to remove a portion of bone from a distal portion of the long bone, the distal reamer having a bone removing portion extending along a longitudinal axis and a shaft portion extending from the bone removing portion along the longitudinal axis, the bone removing portion having a base portion and a plurality of straight cutting flutes extending from the base portion along a corresponding plane and shaped to cut the portion of bone from the distal portion of the long bone;   a proximal reamer configured to overlie the shaft portion of the distal reamer within the long bone, wherein the shaft portion configured to guide the proximal reamer to prepare the proximal portion of the long bone after the distal reamer has prepared the distal portion of the long bone;   a proximal trial spacer, the proximal trial spacer having a flared proximal shoulder with a first outer diameter and a distal shoulder with a second outer diameter that is less than the first outer diameter; and   a trial neck body configured to connect to the distal reamer with a proximal end portion of the proximal reamer.   
     
     
         17 . The system of  claim 16 , further comprising a modular trial neck member configured to be coupled to the trial neck body, wherein the modular trial neck member is configured to adjust at least one of a length, height, or angulation of a trial component. 
     
     
         18 . The system of  claim 17 , wherein the trial neck body includes an aperture defined therein; and
 wherein the modular trial neck member comprises a tapered portion configured to be coupled to the aperture of the trial neck body and to adjust at least one of the length, height, or angulation of the trial component.   
     
     
         19 . The system of  claim 16 , wherein each of the plurality of straight cutting flutes of the distal reamer is shaped to cut the portion of bone from the distal portion of the long bone when the distal reamer is rotated in a first rotational direction about the long axis but not cut the portion of bone when the distal reamer is rotated in a second rotational direction opposite the first rotational direction; and
 wherein the proximal reamer includes cutting flutes shaped to cut the proximal portion of the long bone when the proximal reamer is rotated in the second rotational direction but not cut the proximal portion of the long bone when the proximal reamer is rotated in the first direction.   
     
     
         20 . The system of  claim 19 , further comprising a fastener adapted to secure the trial neck body to the distal reamer at the proximal end portion of the proximal reamer. 
     
     
         21 . The system of  claim 16 , wherein the trial neck body comprises a mating feature configured to adjustably orient a position of the trial neck body about the long axis relative to the proximal reamer. 
     
     
         22 . The system of  claim 21 , wherein the mating feature is incrementally adjustable. 
     
     
         23 . The system of  claim 21 , wherein the mating feature is lockable. 
     
     
         24 . The system of  claim 21 , wherein the mating feature comprises a first set of radially-extending, axially-disposed ridges and grooves; and
 wherein the proximal reamer includes a second set of radially-extending, axially-disposed ridges and grooves configured to engage the first set of radially-extending, axially-disposed ridges and grooves.   
     
     
         25 . The system of  claim 24 , wherein the second set of radially-extending, axially-disposed ridges and grooves establish a splined connection with the first set of radially-extending, axially-disposed ridges and grooves. 
     
     
         26 . A system for preparing a long bone for a prosthetic, comprising:
 a distal cutting instrument having a distal portion extending along a longitudinal axis and a shaft portion extending from the distal portion along the longitudinal axis, wherein the shaft portion includes a shoulder, wherein the distal portion includes a base portion and a plurality of straight cutting flutes extending from the base portion;   a proximal cutting instrument having cutting flutes and a bore, the bore configured to receive the shaft portion of the distal cutting instrument, wherein the shoulder of the distal cutting instrument restricts axial movement of the proximal cutting instrument along the longitudinal axis;   a proximal trial spacer the proximal trial spacer having a flared proximal shoulder with a first outer diameter and a distal shoulder with a second outer diameter less than the first outer diameter; and   a trial neck body configured to connect to the distal cutting instrument and a proximal end portion of the proximal instrument.   
     
     
         27 . The system of  claim 26 , wherein the distal portion of the distal cutting instrument has a distal end and a proximal end; and
 wherein each cutting flute of the plurality of cutting flutes of the distal cutting instrument extends along a corresponding plane from the distal end to the proximal end of the distal portion of the distal cutting instrument.   
     
     
         28 . The system of  claim 26 , further comprising a modular trial neck member configured to be coupled to the trial neck body, wherein the modular trial neck member is configured to adjust at least one of a length, height, or angulation of a trial component. 
     
     
         29 . The system of  claim 26 , wherein the proximal trial spacer has a frustoconical shape that is elongated along the longitudinal axis. 
     
     
         30 . The system of  claim 26 , wherein the proximal trial spacer includes a bore configured to receive the shoulder of the shaft portion of the distal cutting instrument. 
     
     
         31 . A system for preparing a long bone for a prosthetic, the long bone having a long axis, comprising:
 a distal cutting instrument having a proximal shaft and a first distal cutting portion, the first distal cutting portion having a base and a plurality of non-helical cutting flutes extending from the base;   a proximal cutting instrument having a second cutting portion with at least one cutting edge and a bore sized and configured to receive the proximal shaft of the distal cutting instrument;   a proximal trial spacer with a proximal end and a distal end; and   a trial neck body configured to connect to the distal cutting instrument and a proximal end of the proximal instrument.   
     
     
         32 . The system of  claim 31 , further comprising a modular trial neck member configured to be coupled to the trial neck body, wherein the modular trial neck member is configured to adjust at least one of a length, height, or angulation of a trial component. 
     
     
         33 . The system of  claim 31 , wherein the proximal end of the proximal trial spacer has a greater outer diameter than the distal end of the proximal trial spacer. 
     
     
         34 . The system of  claim 31 , wherein the proximal trial spacer has a frustoconical shape that is elongated along the long axis. 
     
     
         35 . The system of  claim 31 , wherein the distal cutting instrument comprises a shoulder configured to restrict axial movement of the proximal cutting instrument along the long axis; and
 wherein the proximal trial spacer includes a bore configured to receive the shoulder.