Adjustable endoprosthesis

Abstract

The present application relates to an endoprosthesis, including a first member which is connected to a patient's bone; a second member which is adjustably coupled to the first member by a coupling device; wherein the coupling device is configured to generate a movement of the second member relative to the first member. The present application also relates to an artificial joint including such an endoprosthesis and to an endoprosthesis placement system including such an endoprosthesis or artificial joint and a projection device which is configured to project visible light markings, acquired from pre-operational and/or intra-operational patient data, onto the patient and/or the endoprosthesis, thus enabling visible alignment markings of the endoprosthesis to be aligned with respect to projected visible light markings so as to allow a proper adjustment of the endoprosthesis.

1 - 16 . (canceled) 
     
     
         17 . A computer-implemented method of adjusting a joint endoprosthesis, the joint endoprosthesis comprising a first component and a second component, the first component comprising a mounting portion configured to be mounted to a first bone and an adjustable portion configured to cooperate with the second component, the adjustable portion comprising a first sector and a second sector that are independently movable with respect to each other, the second component configured to be mounted to a second bone, the method comprising:
 determining, by a computer system, a planned pose for the joint endoprosthesis;   determining, by the computer system, an implanted pose of the joint endoprosthesis;   determining, by the computer system, an adjustment to at least one of the first sector or the second sector to cause the joint endoprosthesis to assume the planned pose from the implanted pose; and   providing, by the computer system, instructions for making the determined adjustment to the joint endoprosthesis.   
     
     
         18 . The method of  claim 17 , wherein providing the instructions comprises displaying, by the computer system, the instructions for making the determined adjustment to the joint endoprosthesis. 
     
     
         19 . The method of  claim 17 , wherein the adjustment comprises at least one of a translational movement or a rotational movement applied to at least one of the first sector or the second sector. 
     
     
         20 . The method of  claim 17 , wherein determining the implanted pose of the joint endoprosthesis comprises tracking, by the computer system, a tracking reference affixed to the first component. 
     
     
         21 . The method of  claim 17 , wherein:
 the joint endoprosthesis comprises a knee joint endoprosthesis;   the first component comprises a tibial component of the knee joint endoprosthesis; and   the second component comprises a femoral component of the knee joint endoprosthesis.   
     
     
         22 . The method of  claim 17 , wherein:
 the joint endoprosthesis comprises a hip joint endoprosthesis;   the first component comprises a stem component of the hip joint endoprosthesis; and   the second component comprises a cup component of the hip joint endoprosthesis.   
     
     
         23 . The method of  claim 17 , wherein:
 the adjustable portion is coupled to the mounting portion by a coupling assembly; and   the adjustment is determined based on a known correlation between movement of the adjustable portion relative to the mounting portion when the coupling assembly is actuated to cause movement of at least one of the first sector or the second sector.   
     
     
         24 . A method of performing a surgical procedure to implant a joint endoprosthesis, the method comprising:
 implanting the joint endoprosthesis in a patient in an implanted pose, the joint endoprosthesis comprising a first component and a second component, the first component comprising a mounting portion configured to be mounted to a first bone and an adjustable portion configured to cooperate with the second component, the adjustable portion comprising a first sector and a second sector that are independently movable with respect to each other, the second component configured to be mounted to a second bone;   determining a planned pose for the joint endoprosthesis;   determining an adjustment to at least one of the first sector or the second sector to cause the joint endoprosthesis to assume the planned pose from the implanted pose; and   actuating at least one of the first sector or the second sector to make the determined adjustment to the joint endoprosthesis.   
     
     
         25 . The method of  claim 24 , further comprising:
 rigidly affixing the joint endoprosthesis in the planned pose after at least one of the first sector or the second sector has been actuated.   
     
     
         26 . The method of  claim 25 , wherein rigidly affixing the joint endoprosthesis in the planned pose comprises applying a curable substance into the joint endoprosthesis to prevent any further movement of the first sector or the second sector. 
     
     
         27 . The method of  claim 26 , wherein the curable substance comprises bone cement. 
     
     
         28 . The method of  claim 24 , wherein at least one of the first sector or the second sector are actuated manually to make the determined adjustment to the joint endoprosthesis. 
     
     
         29 . The method of  claim 24 , wherein at least one of the first sector or the second sector are actuated by a motor assembly to make the determined adjustment to the joint endoprosthesis. 
     
     
         30 . The method of  claim 24 , wherein the adjustment comprises at least one of a translational movement or a rotational movement applied to at least one of the first sector or the second sector. 
     
     
         31 . The method of  claim 24 , wherein determining the implanted pose of the joint endoprosthesis comprises tracking, by a medical navigation system, a tracking reference affixed to the first component. 
     
     
         32 . The method of  claim 24 , wherein:
 the joint endoprosthesis comprises a knee joint endoprosthesis;   the first component comprises a tibial component of the knee joint endoprosthesis; and   the second component comprises a femoral component of the knee joint endoprosthesis.   
     
     
         33 . The method of  claim 24 , wherein:
 the joint endoprosthesis comprises a hip joint endoprosthesis;   the first component comprises a stem component of the hip joint endoprosthesis; and   the second component comprises a cup component of the hip joint endoprosthesis.   
     
     
         34 . The method of  claim 24 , wherein:
 the adjustable portion is coupled to the mounting portion by a coupling assembly; and   the adjustment is determined based on a known correlation between movement of the adjustable portion relative to the mounting portion when the coupling assembly is actuated to cause movement of at least one of the first sector or the second sector.