Method and Apparatus for Preparing Bone for a Prosthetic Device

Abstract

A system ( 10 ) for preparing a long bone for a prosthetic, the long bone having a long axis comprises a distal instrument ( 12 ) and a proximal instrument ( 14 ). The distal instrument ( 12 ) is configured to remove bone from a distal portion of bone. The distal instrument ( 12 ) has a bone removing portion ( 16 ) configured to remove bone along the long axis of the long bone and a shaft ( 18 ) extending from the bone removing portion ( 16 ) along the long axis of the long bone. The proximal instrument ( 14 ) is configured to overlie the shaft ( 18 ) of the distal element ( 12 ) within the long bone. The distal shaft ( 18 ) guides the proximal instrument ( 14 ) to prepare the proximal portion of the long bone after the distal instrument ( 12 ) has prepared the distal portion of the long bone.

What is claimed is: 
     
         1 . A system for preparing a long bone for a prosthetic, the long bone having a long axis, comprising: a distal instrument configured to remove bone from a distal portion of bone, the distal instrument having a bone removing portion configured to remove bone along the long axis of the long bone and a shaft extending from the bone removing portion along the long axis of the long bone; a proximal instrument configured to overlie the shaft of the distal element within the long bone, wherein the distal shaft guides the proximal instrument to prepare the proximal portion of the long bone after the distal instrument has prepared the distal portion of the long bone bone: a proximal trial spacer, the proximal trial spacer having a frustoronical shape with a proximal end portion and a distal end portion; and a trial neck body configured to connect to the distal cutting instrument and the proximal end portion of the proximal trial spacer. 
     
     
         2 . The system of  claim 1 , wherein the distal instrument is a reamer. 
     
     
         3 . The system of  claim 1 , wherein the proximal instrument is a reamer. 
     
     
         4 .- 5 . (canceled) 
     
     
         6 . The system of  claim 1 , wherein the trial spacer and the trial neck body comprise a mating feature configured to adjustably orient a radial position. 
     
     
         7 . The system of  claim 6 , wherein the mating feature is incrementally adjustable. 
     
     
         8 . The system of  claim 6 , wherein the mating feature is lockable. 
     
     
         9 . The system of  claim 1  further comprising a modular trial neck segment, wherein the modular trial neck segment is configured to adjust at east one of an offset, version, or height of a trial component. 
     
     
         10 .- 18 . (canceled) 
     
     
         19 . A system for preparing a long bone for a prosthetic, the long bone having a long axis, comprising:
 a. a distal cutting instrument having a proximal end, a distal end having at least one cutting edge, and a shaft with a mechanical stop feature;   b. a proximal cutting instrument having cutting flutes, a shaft portion, and a bore, the bore configure to receive the shaft of the distal cutting instrument;   c. a proximal trial spacer the proximal trial spacer having a frustoconical shape with a proximal end portion and a distal end portion; and   d. a trial neck body configured to connect to the distal cutting instrument and the proximal end portion of the proximal trial spacer.