Bone graft shaper & patient specific bone graft

Abstract

Joint prosthesis methods and apparatuses are provided. A bone graft blank is placed in the chamber of the bone press facing a contoured surface. The contoured surface can be part of the bone press or can comprise a surface of a patient specific negative that can be inserted into the bone press. A bone contact surface of the bone graft blank is disposed in the chamber to face the contoured surface of the patient specific insert negative. The bone contact surface of the bone graft blank is compressed against the contoured surface. The bone contact surface can be reshaped to form a patient specific bone graft.

1 . A method of forming a joint prosthesis component, comprising:
 placing a prosthesis component in a chamber of a bone press, the prosthesis component having a medial side and a lateral second side;   placing a bone graft blank in the chamber of the bone press between a contoured surface of a patient specific insert negative and the medial side of the prosthesis component, such that a bone contact surface of the bone graft blank is facing the contoured surface of the patient specific insert negative; and   compressing the bone contact surface of the bone graft blank against the contoured surface of the patient specific insert negative;   reshaping the bone contact surface, thereby forming a patient specific bone graft.   
     
     
         2 . The method of  claims 1 , further comprising obtaining the bone graft blank from a bone of a patient for whom the patient specific bone graft is to be implanted. 
     
     
         3 . The method of  claim 1 , further comprising obtaining the three dimensional spatial location information 
     
     
         4 . The of  claim 3 , wherein obtaining the three dimensional spatial location information comprises performing a CT scan of a bone surface forming a portion of a joint to be coupled with the patient specific bone graft. 
     
     
         5 . The method of  claim 4 , further comprising forming the patient specific insert negative based upon the three dimensional spatial location information. 
     
     
         6 . The method of  claim 1 , wherein the prosthesis component comprises a baseplate of a shoulder implant and further comprising:
 placing the bone graft blank on the medial side of the glenoid baseplate and placing the bone graft blank and the glenoid baseplate into the bone press such that the bone contacting surface of the bone graft blank faces the contoured surface of the patient specific insert negative; and   compressing the bone graft blank between the glenoid baseplate and the contoured surface of the patient specific insert negative; and   reshaping the bone contact surface to match a lateral portion of a scapula.   
     
     
         7 . The method of  claim 6  further comprising:
 mounting the baseplate onto an impacting plate of an impactor and placing the bone graft blank onto the impactor such that the baseplate is between the bone graft blank and the impacting plate; and 
 placing the impacting plate, the baseplate, and the bone graft blank into the chamber of the bone press such that the bone contact surface of the bone graft blank faces the contoured surface of the patient specific insert negative. 
 
     
     
         8 . The method of  claim 1 , further comprising:
 mounting the prosthesis component onto an impacting plate of an impactor and placing the bone graft blank onto the impactor such that the prosthesis component is between the bone graft blank and the impacting plate;   placing the impacting plate, the prosthesis component, and the bone graft blank into the chamber of the bone press such that the bone contact surface of the bone graft blank faces the contoured surface of the patient specific insert negative; and   compressing the bone graft blank between the prosthesis component and the contoured surface of the patient specific insert negative; and   reshaping the bone contact surface to match a bone portion to which the patient specific bone graft is to be coupled.   
     
     
         9 . The method of  claims 1 , further comprising threading a first portion of the bone press on a second portion of the bone press to compress and reshape the bone graft blank between the prosthesis component and the contoured surface of the patient specific insert negative. 
     
     
         10 . The method of  claims 1 , further comprising actuating a lever to move a first portion of the bone press toward a second portion of the bone press to compress and reshape the bone graft blank between the first prosthesis component and the contoured surface of the patient specific insert negative. 
     
     
         11 . A method of forming a bone press component, comprising:
 obtaining three dimensional spatial location information of a bone portion of a joint; and   forming a patient specific insert negative comprising a contoured surface based on the three dimensional spatial location information, the patient specific insert negative being configured to be mounted on a bone press and to shape a bone graft blank upon application of pressure in the bone press.   
     
     
         12 . The method of  claim 11 , wherein the three dimensional spatial location information comprises a three dimensional contour of a lateral portion of a scapula including at least a portion of a glenoid surface. 
     
     
         13 . The method of  claim 12 , wherein obtaining three dimensional spatial location information comprises performing a CT scan of the glenoid surface or portion of the scapula. 
     
     
         14 . A method of forming a patient specific bone graft comprising:
 providing a bone press comprising a patient specific insert negative disposed in a pressing zone thereof, the patient specific insert negative comprising a contoured surface based on three dimensional spatial location information of a bone portion to which the patient specific bone graft is to be coupled;   placing a bone graft blank into the pressing zone; and   compressing the bone graft blank against the contoured surface of the patient specific insert negative to cause a bone contacting surface of the bone graft blank to conform to the contoured surface of the patent specific insert negative, thereby forming a patient specific bone graft.   
     
     
         15 . The method of  claim 14 , wherein the pressing zone is enclosed by a cover configured to oppose forces applied by the patient specific insert negative to the bone graft blank. 
     
     
         16 . The method of  claim 15 , further comprising removing the cover and placing the bone graft blank into the pressing zone and thereafter replacing the cover 
     
     
         17 . The method of  claim 16 , further comprising placing a prosthesis component between the cover and the bone graft blank and, after compressing the bone graft blank, removing the prosthesis component and the patient specific bone graft from the pressing zone. 
     
     
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