System and method of bone preparation

Abstract

The invention includes a system, method and kit for preparation of a bone. One aspect of the present invention is a bone preparation system comprising a cutting instrument and a guiding element. The cutting instrument includes a distal attachment feature and a distal region. The guiding element includes a proximal attachment feature and a guiding surface. When the proximal attachment feature of the guiding element is engaged with the distal attachment feature of the cutting instrument, the cutting instrument can pivot about the proximal attachment feature until the distal region contacts the guiding surface.

1 . A bone preparation system comprising:
 a cutting instrument including a first attachment feature and a first region; and   a guiding element including a second attachment feature and a guiding surface,   wherein the second attachment feature is engaged with the first attachment feature so that the cutting instrument can rotate and pivot about the guiding element, contact between the first region and the guiding surface determining the amount of pivot of the cutting instrument about the guiding element.   
     
     
         2 . The bone preparation system of  claim 1 , wherein
 the first attachment feature is a distal attachment feature and the first region is a distal region; and   the second attachment feature is a proximal attachment feature.   
     
     
         3 . The bone preparation system of  claim 2 , wherein the distal region includes a distal end and a distal surface. 
     
     
         4 . The bone preparation system of  claim 1 , wherein the guiding surface extends 360 degrees around the second attachment feature. 
     
     
         5 . The bone preparation system of  claim 1 , wherein the guiding surface extends around a portion of the second attachment feature. 
     
     
         6 . The bone preparation system of  claim 1 , wherein the guiding surface is derived from an outer profile of an augment implant. 
     
     
         7 . The bone preparation system of  claim 6 , wherein the augment profile is derived from a pre-operative patient specific imaging process. 
     
     
         8 . The bone preparation system of  claim 1 , wherein the guiding element includes a first end having at least one fixation feature. 
     
     
         9 . The bone preparation system of  claim 1 , wherein the guiding element further includes an aperture for engaging a stem. 
     
     
         10 . The bone preparation system of  claim 9 , wherein the stem further includes an outer profile having a cutting feature. 
     
     
         11 . The bone preparation system of  claim 9 , wherein
 the second attachment feature has a central axis and the guiding element aperture has a central axis,   the stem has a central axis,   wherein the second attachment feature central axis, aperture central axis and stem central axis are aligned.   
     
     
         12 . The bone preparation system of  claim 9 , wherein
 the second attachment feature has a central axis and the guiding element aperture has a central axis,   the stem has a central axis,   wherein the second attachment feature central axis is offset from the aperture central axis, and the aperture central axis and stem central axis are aligned.   
     
     
         13 . The bone preparation system of  claim 1 , wherein the second attachment feature is a sphere and the first attachment feature is a spherical female indentation. 
     
     
         14 . A method of bone preparation comprising:
 inserting a guiding element into a canal of a bone;   attaching a cutting instrument with a central axis to the guiding element;   preparing the bone by pivoting the cutting instrument about the guiding element; and   removing the cutting instrument and the guiding element from the prepared bone.   
     
     
         15 . The method of bone preparation of  claim 14 , further comprising the step of preparing the canal of the bone. 
     
     
         16 . The method of bone preparation of  claim 15 , wherein the preparing the canal step includes utilizing a reamer. 
     
     
         17 . The method of bone preparation of  claim 16 , wherein the inserting step includes engaging the guiding element with the reamer. 
     
     
         18 . The method of bone preparation of  claim 15 , further comprising the step of inserting a prosthetic implant into the prepared bone. 
     
     
         19 . The method of bone preparation of  claim 14 , further comprising the step of rotating the cutting instrument about the central axis. 
     
     
         20 . The method of bone preparation of  claim 19 , further comprising the step of pivoting the cutting instrument about the guiding element. 
     
     
         21 . The method of bone preparation of  claim 14 , further comprising the step of imaging of the bone of a patient. 
     
     
         22 . The method of bone preparation of  claim 21 , further comprising the step of developing a patient specific implant based on the pre-operative imaging of the bone of a patient. 
     
     
         23 . A bone preparation kit comprising:
 an augment implant for the metaphyseal region of a long bone; and   a guiding element including a guiding surface,   wherein the guiding surface is derived from an outer profile of the augment implant.   
     
     
         24 . The bone preparation kit of  claim 23 , wherein the augment implant includes a geometry based on pre-operative patient imaging. 
     
     
         25 . The bone preparation kit of  claim 23 , wherein the guiding surface includes a distal end having at least one fixation feature. 
     
     
         26 . The bone preparation kit of  claim 23 , wherein the guiding element further includes an aperture designed to engage a stem. 
     
     
         27 . The bone preparation kit of  claim 26 , wherein the stem is a reamer.