Implant system

Abstract

The invention relates to an implant system having at least one shaft of a prosthesis, in particular a hip joint prosthesis, which can be anchored without cement, and a set of instruments for the preparation of the bone in which the shaft is to be anchored, wherein the shaft has an arcuate base body with a trapezoidal or rectangular cross-section and the set of instruments includes a first instrument which is shaped in accordance with the arcuate shape of the shaft and with which a recess serving for the reception of the base body can be established in the bone; and wherein the shaft is provided with ribs in the proximal region and the set of instruments includes a guide body shaped in accordance with the arcuate shape of the shaft for a second instrument with which structures can be manufactured in the bone serving to fix a path for the shaft ribs when the guide body is located in the recess.

1 - 23 . (canceled) 
     
     
         24 : A method of preparing a long bone for the receipt of a prosthesis, the prosthesis including an arcuate portion, the method comprising the steps of:
 inserting a guide body into a recess in the long bone;   positioning the guide body to correspond to an implanted position of the prosthesis; and   guiding an instrument along the guide body and into the long bone, the instrument having an arcuate portion corresponding to an arcuate portion of the prosthesis, the instrument forming a recess in the long bone having the substantially same arcuate shape as the arcuate portion of the prosthesis.   
     
     
         25 : The method of  claim 24 , wherein the guiding step further comprises guiding an instrument along the guide body and into the long bone, the arcuate portion of the instrument including an arcuate web extending outwardly therefrom, the arcuate web corresponding to an arcuate rib of the prosthesis, the arcuate rib of the prosthesis having a radius of curvature, wherein the arcuate web forms a recess in the long bone having the substantially same radius of curvature as the arcuate rib of the prosthesis. 
     
     
         26 : The method of  claim 24 , further comprising the step of rasping the long bone to form a recess in the long bone. 
     
     
         27 : The method of  claim 24 , wherein the guiding step further comprises guiding an instrument along the guide body by positioning at least a portion of the instrument within a recess formed in the guide body. 
     
     
         28 : The method of  claim 27 , wherein the guiding step further comprises guiding a counter-surface of the instrument along a guide surface of the guide body, wherein the guide surface of the guide body defines the recess in the guide body. 
     
     
         29 : The method of  claim 24 , wherein the guiding step further comprises guiding an instrument along the guide body by moving at least a portion of the instrument along a track defined by the guide body. 
     
     
         30 : The method of  claim 24 , wherein the instrument further comprises a substantially U-shaped instrument. 
     
     
         31 : A method of preparing a femur for the receipt of a proximal femoral prosthesis, the prosthesis including an arcuate rib extending therefrom having a radius of curvature, the method comprising the steps of:
 rasping an intramedullary canal of the femur;   inserting a guide body into the intrameduallary canal in the femur;   positioning the guide body at least partially within the intrameduallary canal, the position of the guide body corresponding to an implanted position of the prosthesis; and   guiding an instrument along the guide body and at least partially into the intramedually canal of the femur, the instrument having an arcuate web extending outwardly therefrom, the arcuate web corresponding to the arcuate rib of the prosthesis, the arcuate web forming a track in the long bone having the substantially same radius of curvature as the arcuate rib of the prosthesis.   
     
     
         32 : The method of  claim 31 , wherein the guiding step further comprises guiding an instrument along the guide body by positioning at least a portion of the instrument within a recess formed in the guide body. 
     
     
         33 : The method of  claim 32 , wherein the guiding step further comprises guiding a counter-surface of the instrument along a guide surface of the guide body, wherein the guide surface of the guide body defines the recess in the guide body. 
     
     
         34 : The method of  claim 31 , wherein the guiding step further comprises guiding an instrument along the guide body by guiding at least a portion of the instrument along a track defined by the guide body. 
     
     
         35 : The method of  claim 31 , wherein the instrument further comprises a substantially U-shaped instrument.