Abstract: A prosthetic device for forming at least a portion of a joint may have a plurality of segmented components fixed relative to a femur of a body including: a patellofemoral component and a condyle component. Each segmented component may be configured such that a placement at which the segmented component will be fixed relative to the femur is not constrained by a connection to another of the segmented components that is fixed relative to the femur. In an installed configuration, the patellofemoral and condyle components may be fixed relative to the femur such that: a gap is provided between an edge of the patellofemoral component and an opposing edge of the condyle component, and a transition region is provided that extends from a first femoral coronal plane that intersects the patellofemoral component to a second femoral coronal plane that intersects the condyle component.

Abstract: A method for preoperatively characterizing an individual patient's biomechanic function in preparation of implanting a prosthesis is provided. The method includes subjecting a patient to various activities, recording relative positions of anatomy during said various activities, measuring force environments responsive to said patient's anatomy and affected area during said various activities, characterizing the patient's biomechanic function from said relative positions and corresponding force environments, inputting the measured force environments, relative positions of knee anatomy, and patient's biomechanic function characterization into one or more computer simulation models, inputting a computer model of the prosthesis into said one or more computer simulation models, and manipulating the placement of the prosthesis in the computer simulation using said patient's biomechanic function characterization and said computer model of the prosthesis to approximate a preferred biomechanical fit of the prosthesis.

Abstract: A method for preoperatively characterizing an individual patient's biomechanic function in preparation of implanting a prosthesis is provided. The method includes subjecting a patient to various activities, recording relative positions of anatomy during the various activities, measuring force environments responsive to the patient's anatomy and affected area during the various activities, characterizing the patient's biomechanic function from the relative positions and corresponding force environments, inputting the measured force environments, relative positions of knee anatomy, and patient's biomechanic function characterization into the one or more computer simulation models, inputting a computer model of the prosthesis into the one or more computer simulation models, and manipulating the placement of the prosthesis in the computer simulation using the patient's biomechanic function characterization and the computer model of the prosthesis to approximate a preferred biomechanical fit of the prosthesis.

Abstract: A prosthetic device for a knee joint includes a body portion and a first keel. The body portion attaches to a bone of a knee joint. The body portion can have a bearing surface configured to replace at least a portion of the bone and an implantation surface configured to face the bone upon implantation. The first keel can be configured to be inserted into a corresponding first keel void formed in the bone. The first feel can be configured to project outwardly from the implantation surface by an amount sufficient to inhibit movement of the body portion relative to the bone in both medial and lateral directions upon insertion into the first keel void. The first keel can extend along a longitudinal direction of the body portion and is offset from a longitudinal centerline of the body portion. Methods of implanting and removing the prosthetic device are also provided.

Abstract: A method for preoperatively characterizing an individual patient's biomechanic function in preparation of implanting a prosthesis is provided. The method includes subjecting a patient to various activities, recording relative positions of anatomy during said various activities, measuring force environments responsive to said patient's anatomy and affected area during said various activities, characterizing the patient's biomechanic function from said relative positions and corresponding force environments, inputting the measured force environments, relative positions of knee anatomy, and patient's biomechanic function characterization into one or more computer simulation models, inputting a computer model of the prosthesis into said one or more computer simulation models, and manipulating the placement of the prosthesis in the computer simulation using said patient's biomechanic function characterization and said computer model of the prosthesis to approximate a preferred biomechanical fit of the prosthesis.

Abstract: A prosthetic device for forming at least a portion of a joint may have a plurality of segmented components fixed relative to a femur of a body including: a patellofemoral component and a condyle component. Each segmented component may be configured such that a placement at which the segmented component will be fixed relative to the femur is not constrained by a connection to another of the segmented components that is fixed relative to the femur. In an installed configuration, the patellofemoral and condyle components may be fixed relative to the femur such that: a gap is provided between an edge of the patellofemoral component and an opposing edge of the condyle component, and a transition region is provided that extends from a first femoral coronal plane that intersects the patellofemoral component to a second femoral coronal plane that intersects the condyle component.