Abstract: A computer-assisted implant positioning system is provided that includes a receiver; a memory operatively connected to the receiver and a processor. The processor is configured to receive preoperative patient-specific data, receive a 3D model of the subject implant, receive an intraoperative patient-specific 2D image of the target bone, register the 3D model of the subject implant to the intraoperative patient-specific 2D image and determine a best fit for the 3D model of the subject implant to the intraoperative patient-specific 2D image, register the 3D bone model of the target bone to the intraoperative patient-specific 2D image of the target bone and determine a best fit for the 3D bone model to the intraoperative patient-specific 2D image, determine an achieved 3D implant position based on the registered 3D model of the subject implant and the registered 3D bone model, and assess the achieved implant position relative to the preoperative patient-specific data.

Abstract: A computer assisted orthopedic surgery system for soft tissue balancing and implant planning is provided. The system includes a three dimensional position tracking system, a robot, a display, and a computer. The computer is operatively in communication with the three dimensional position tracking system, the robot and the display. The computer includes a processor configured to acquire native gap data between a first bone and a second bone of a joint, simulate implant gap data between a first implant model on a first bone model of the first bone and a second implant model on a second bone model of the second bone of the joint based on an implant planning criteria to calculate a plurality of implant gap profiles, determine a best match of the plurality of implant gap profiles to the native gap profile to determine an optimized implant plan, and output the optimized implant plan.

Abstract: A joint prosthesis and/or trial implant alignment system (10) for intraoperatively assisting an alignment of a joint prosthesis and/or trial implant (12) during a surgical procedure is disclosed. The system comprises patient-specific pre-operative data (14) forming a three-dimensional image (14) containing bone structure (32) and a predetermined alignment of the joint prosthesis and/or trial implant (12) thereon. A patient imaging device (16) is for producing patient-specific intraoperative data 18 which forms a two-dimensional image 18 showing bone structure (32) and a real-time position of the joint prosthesis and/or trial implant (12) thereon. Registration means (20) registers the intraoperative data 18 with the pre-operative data (14) based on geometry of said bone structure and/or geometry of said joint prosthesis and/or trial implant (12).

Abstract: A method for aligning a patient implant, the method comprising the steps of: generating a digital implant model of the patient implant; determining a desired alignment of the patient implant based on predetermined alignment data; imaging an operative area of the patient to create patient-specific implant reference data; creating a virtual overlay of the digital implant model in the determined desired alignment relative to the patient-specific implant reference data; and operatively aligning the patient implant using the virtual overlay. A patient implant system to implement the method is also provided.

Abstract: There is provided a method (100) for aligning and positioning an implant (305). The method (100) comprises creating a reference using a guide (500) configured in accordance with patient specific data; fixing the reference using a reference marker (920) and delivering the implant (305) with an impactor (1005) aligned in accordance with the reference. Guide light emission means (515a) may be employed to create the reference, reference marker light emission means (515b) may be employed to fix the reference and impactor light emission means (515c) may be employed to align an impactor (1005).

Abstract: A femoral sizing jig for use in total arthroplasty of left and right knees, comprises a femoral body, an external-rotation-angle arm which is, preferably pivotable, relative to the femoral body for setting an external angular rotation of a left or right femur, at least one of a cutting-jig guide and a cutting jig which is, preferably slidable, relative to the femoral body and in unison with movement of the external rotation-angle arm, and a medial posterior-condylar locator which is movable in unison with the movement of the external-rotation-angle arm, so as to maintain a fixed or substantially fixed relative distance with a medial side of the at least one of a cutting-jig guide and a cutting jig. A posterior-referencing femur resecting system using said femoral sizing jig and a method of resecting a femur at a knee joint relative to the medial posterior condyle are also provided.

Abstract: The present disclosure relates to a method incorporating computer-implemented steps, a computing device, and a computer readable storage medium, for developing manufacturing parameters for manufacturing an orthopaedic implant. The method comprises the computer-implemented steps of being responsive to patient specific information data for deriving patient data, where the patient specific information data is indicative of one or more dynamic characteristics, being responsive to the patient data for calculating design data for the orthopaedic implant, and developing the manufacturing parameters for manufacturing the orthopaedic implant according to the design data.

Abstract: The present disclosure relates to a method incorporating computer-implemented steps, a computing device, a computer readable storage medium, and a client computing device for modelling the alignment of an orthopedic implant for a joint of a patient. The method comprises the computer-implemented steps of being responsive to patient specific information data for deriving patient data, where the patient specific information data is indicative of one or more dynamic characteristics, and being responsive to the patient data for providing 3D model data of the joint, such that the 3D model data shows the orthopedic implant in an alignment configuration based on the patient specific information data.

Abstract: A femoral sizing jig for use in total arthroplasty of left and right knees, comprises a femoral body, an external-rotation-angle arm which is, preferably pivotable, relative to the femoral body for setting an external angular rotation of a left or right femur, at least one of a cutting-jig guide and a cutting jig which is, preferably slidable, relative to the femoral body and in unison with movement of the external rotation-angle arm, and a medial posterior-condylar locator which is movable in unison with the movement of the external-rotation-angle arm, so as to maintain a fixed or substantially fixed relative distance with a medial side of the at least one of a cutting-jig guide and a cutting jig. A posterior-referencing femur resecting system using said femoral sizing jig and a method of resecting a femur at a knee joint relative to the medial posterior condyle are also provided.

Abstract: An acetabular cup comprises an outer shell preferably having a first tensile modulus, an inner liner preferably having at least a second tensile modulus which is greater than that of the said first tensile modulus, and at least one reinforcing element which extends from a polar region of the outer shell along a, preferably interior, surface of the outer shell. Preferably, a wall thickness of the outer shell at a region of intersection between a part-spherical portion and a frusto-conical portion of the outer shell is less at the part-spherical portion than at the frusto-conical portion. The reinforcing element has a longitudinal extent which improves the rigidity of the wall at at least the part-spherical portion.

Abstract: There is described a jig for identifying a point on the femoral head which is in alignment with a central axis of the femoral neck. The jig comprises a first member which defines a plane and has means for at least partially receiving the femoral neck. The jig also comprises a guide member which is mounted apart from the first member and which defines an axis at right angles to the plane defined by the first member. The axis of the guide member intersects the plane at a point which is a predetermined distance away from the means receiving the femoral neck. In addition, the jig comprises an elongate alignment means which is mounted with respect to the first member and which is spaced apart from, but extends parallel to, the axis of the guide member. There is also described a kit for use in the resurfacing of the femoral head. The kit comprises at least one jig as previously described.

Abstract: A hip prosthesis system (10) comprises a hip-resurfacing femoral component (12) for use with a prepared natural femoral neck, a total-hip-replacement femoral component (14) for insertion into the femur following removal of the natural head and at least in part neck and which is different to the hip-resurfacing femoral component (12), and a common femoral cap (16) which defines a part-spherical articulating surface (82) for engagement with an acetabular cup and which is selectively engagably mountable on the hip-resurfacing femoral component (12) and the total-hip-replacement femoral component (14). A method of intra-operably selecting between a hip resurfacing procedure and a total hip replacement procedure using such a system (10) is also provided.

Abstract: There is described a jig for identifying a point on the femoral head which is in alignment with a central axis of the femoral neck. The jig comprises a first member which defines a plane and has means for at least partially receiving the femoral neck. The jig also comprises a guide member which is mounted apart from the first member and which defines an axis at right angles to the plane defined by the first member. The axis of the guide member intersects the plane at a point which is a predetermined distance away from the means receiving the femoral neck. In addition, the jig comprises an elongate alignment means which is mounted with respect to the first member and which is spaced apart from, but extends parallel to, the axis of the guide member. There is also described a kit for use in the resurfacing of the femoral head. The kit comprises at least one jig as previously described.

Abstract: There is described a jig for identifying a point on the femoral head which is in alignment with a central axis of the femoral neck. The jig comprises a first member which defines a plane and has means for at least partially receiving the femoral neck. The jig also comprises a guide member which is mounted apart from the first member and which defines an axis at right angles to the plane defined by the first member. The axis of the guide member intersects the plane at a point which is a predetermined distance away from the means receiving the femoral neck. In addition, the jig comprises an elongate alignment means which is mounted with respect to the first member and which is spaced apart from, but extends parallel to, the axis of the guide member. There is also described a kit for use in the resurfacing of the femoral head. The kit comprises at least one jig as previously described.

Abstract: A bone tapping kit for cutting an internal thread into bone defining a bore. The kit comprises 1) a guide component with a threaded aperture which, when in position, is aligned with the bore, and 2) a tap having a first portion with a first diameter and an external thread designed to engage with the threaded aperture of the guide component, and a second portion having a second diameter which is smaller than the first diameter and a helical cutting edge designed so that it can be received into the bore and cut an internal thread therein. The guide component and tap are dimensioned so that when the tap is introduced into the guide component the first portion engages with the threaded aperture in the guide component before the helical cutting edge of the second portion engages with the bore. Thus, the thread configuration that is cut into the bore forms a continuation of the same helix defined by the internal thread of the aperture of the guide member.

Abstract: An intervertebral prosthesis which is designed to be at least partially received within an intervertebral disc space. The intervertebral disc space is defined between an end plate of a first vertebral body and an adjacent end plate of a second, adjacent vertical body. The prosthesis comprises a first component which is designed to be attached to the first vertebral body and a second component which is designed to be attached to the second vertebral body. The first and second components comprise surfaces which, in use, are directed towards the opposing end plate and which extend substantially entirely across the part of the component which is received within the intervertebral disc space. The surfaces of both the first and second components define respective monotonic curves which have no discontinuities therein.

Abstract: A bone tapping kit for cutting an internal thread into bone defining a bore. The kit comprises 1) a guide component with a threaded aperture which, when in position, is aligned with the bore, and 2) a tap having a first portion with a first diameter and an external thread designed to engage with the threaded aperture of the guide component, and a second portion having a second diameter which is smaller than the first diameter and a helical cutting edge designed so that it can be received into the bore and cut an internal thread therein. The guide component and tap are dimensioned so that when the tap is introduced into the guide component the first portion engages with the threaded aperture in the guide component before the helical cutting edge of the second portion engages with the bore. Thus, the thread configuration that is cut into the bore forms a continuation of the same helix defined by the internal thread of the aperture of the guide member.