Patient-specific assemblies, jigs, and methods for a personalized total hip arthroplasty system

A total hip arthroplasty system providing patient-specific control of hip geometry such that a femoral stem implant and an acetabular cup implant are positioned relative to one another with a hip geometry ideal for the specific patient, the total hip arthroplasty system comprising:

• (a) A patient-specific acetabular reaming and impacting assembly comprising:
• a pin locating jig comprising a body having a periphery and a least three patient-specific cannulated nubs, each nub attached to the periphery by at least one tab and having at and at least one surface contoured to engage a portion of an outer rim of an acetabulum of the patient at a self-selecting position and through which a surgical pin may be inserted and secured to the outer rim of the acetabulum, where upon removal of the body a pin rail system is formed comprising at least three surgical pins, each secured through a nub forming a base;
• a removable reamer jig comprising at least three peripheral pin holes, each hole corresponding to a pin of the pin rail system permitting engagement of the reamer jig to the pin rail system, and an axial bore through which an acetabular reaming device may be inserted and attached;
• at least one set of spacing elements;
• a removable impactor jig comprising at least three peripheral pin holes, each hole corresponding to a pin of the pin rail system permitting sliding engagement of the impactor jig to the pin rail system, and a cup portion sized to fit into an implant cup, and an axial bore through which an acetabular impacting device may be inserted to guide and impact the implant into position in the acetabulum;
• (b) a patient-specific femoral resection jig comprising:
• a monolithic body having at least proximal, distal, medial and lateral surfaces, the distal surface providing a resection reference for guiding a cutting instrument to resect a femoral head, the medial surface comprising a patient-specific surface contoured as a negative to a surface of the patient's femoral neck such that the jig self-selects to engage a position on the surface of the femoral neck, and a medial-distal corner positioned upon engagement to provide a visual indicator of version;
• and
• (c) a patient-specific femoral version assembly comprising:
• a version guide contoured to fit a portion of a rim of a resected face of a femur and to substantially cover the resected face, the guide comprising an opening to the resected face into which a set of jig inserts including a standard reaming jig, a broaching jig and an implant placement jig may be seated and removed under operational conditions.

A hip hemiarthroplasty system providing patient-specific control of hip geometry such that a femoral stem implant is positioned relative to an acetabulum with a hip geometry ideal for the specific patient, the hip hemiarthroplasty system comprising:

• (a) a patient-specific femoral resection jig comprising:
• a monolithic body having at least proximal, distal, medial and lateral surfaces, the distal surface providing a resection reference for guiding a cutting instrument to resect a femoral head, the medial surface comprising a patient-specific surface contoured as a negative to a surface of the patient's femoral neck such that the jig self-selects to engage a position on the surface of the femoral neck, and a medial-distal corner positioned upon engagement to provide a visual indicator of version;
• and
• (b) a patient-specific femoral version assembly comprising:
• a version guide contoured to fit a portion of a rim of a resected face of a femur and to substantially cover the resected face, the guide comprising an opening to the resected face into which a set of jig inserts including a standard reaming jig, a broaching jig and an implant placement jig may be seated and removed under operational conditions.