Abstract: Embodiments of the present application relate generally to provisional orthopedic components, and more specifically relate to a trial system including a cam module and a trial femoral component that can be used during joint replacement surgery. The systems and methods of the present application aid a surgeon in the preparation of a patient's bone to receive a permanent implant by providing a system that can be used to guide preparatory box cuts, and that can then be completed with a cam module without removal from the patient's bone so that the same component can be used for the trialing process.

Abstract: A system for preparing a bone for implantation of a component of an orthopedic implant device. The system includes a forming tool having a sleeve member that is selectively received within a handle member. The sleeve member has a guide slot that is sized to receive axial passage of at least a portion of a guide. The guide slot and/or sleeve member may be positioned and/or configured to facilitate at least linear and/or rotational displacement of the forming tool about, or relative to, the guide, and thereby provide a degree of freedom in the location at which the forming tool may form a shape or opening in the bone relative to one or more reference axes. The handle member may include a connection member that is structured to be operably coupled to a bone preparation device that is structured to facilitate the displacement of bone material.

Abstract: An instrumentation system that includes a reamer sleeve having a reamer wall and a wedge body, the reamer wall being oriented about a central longitudinal axis. The reamer wall includes an inner passage that is sized to receive insertion of a reference instrument that is structured for placement in a canal in a bone. The inner passage can be centrally oriented about a longitudinal axis that is offset from at least the central longitudinal axis of the reamer wall. The wedge body can have a wedge surface that extends axially in a direction that is non-parallel and non-perpendicular to the central longitudinal axis. The apparatus also can include a cap having an opening that is sized to receive insertion of the wedge body. The cap can further include an inner wall having a tapered wall section that is oriented to matingly engage the wedge surface of the wedge body.

Abstract: Augments for implantation of an orthopedic implant device in a bone. A distal end of an outer portion of the augment can have a shape that is configured to generally conform to the shape of a metaphyseal-diaphyseal junction of an intramedullary canal of the bone. Further, a proximal end of the outer portion of the augment has a shape that is configured to generally conform to a shape of the metaphyseal region of the intramedullary canal. Additionally, the shape of the outer portion at the distal end can be separated from the shape of the outer portion at the proximal end by a distance that is approximately equal to the distance between the metaphyseal-diaphyseal junction and the metaphyseal region of the intramedullary canal.

Abstract: A forming tool for use with a bone preparation device to form an opening or shape in a bone, such as, for example, an opening for an augment of an orthopedic implant device. The forming tool can include a guide slot that extends through an outer wall of the forming tool, the guide slot being symmetrical or asymmetrical in cross sectional shape. The guide slot is adapted to axially receive insertion of a guide that can be structured for placement in an intramedullary canal in a bone of a patient. Additionally, the guide slot can be sized to accommodate linear, angular, and/or rotational displacement of the forming tool about the received guide in a manner that can offset at least the position of the opening formed in the bone relative to one or more reference axes.

Abstract: Anatomically shaped augments that are configured for implantation in a bone and which have one or more reliefs. A distal end of an outer portion of the augment can have a shape that is configured to generally conform to the shape of a metaphyseal-diaphyseal junction of an intramedullary canal of a bone. A proximal end of the outer portion can have a shape that is configured to generally conform to a shape of the metaphyseal region of the intramedullary canal. The reliefs can be configured to reduce a size of the augment and enhance the degree of freedom in the implant positioning and/or sizing of the augment. Further, such reliefs may contour the augment so as to prevent cortical bone contact and/or prevent contact with the implant device that may be associated with misalignment between an intramedullary canal and metaphyseal or diaphyseal regions of the bone.

Abstract: A hinged knee prosthesis comprises a tibial component and a femoral component. The tibial component is configured to attach to a tibia. The tibial component has a bearing surface. The femoral component is configured to hingedly attach to the tibial component and rotate relative to the tibial component. The femoral component comprises a medial condyle and a lateral condyle. The medial and lateral condyles have an eccentric sagittal curvature surface configured to rotate and translate on the bearing surface of the tibial component. A method of rotating a hinged knee through a range of flexion is provided. The method fixedly attaches a femoral component to a tibial component. Axial rotation of the femoral component is induced relative to the tibial component when the hinged knee is flexed.

Abstract: Implants, and processes for installing them, which replace the medial condyle and portions of the patellofemoral channel but preferably not portions of the lateral condyle that articulate relative to the tibia. Processes are provided which allow proper location and orientation of an anterior resection and a distal resection on the femur, which make use of a transition point which can be designated on the bone, for navigating proper positioning of such implants. Proper positioning of the implant relative to the femur for insuring a smooth transition between lateral portions of the implant and the lateral condyle is thus reduced to determining proper medial/lateral location of the implant on the anterior and distal resections.

Abstract: A hinged knee prosthesis comprises a tibial component and a femoral component. The tibial component is configured to attach to a tibia. The tibial component has a bearing surface. The femoral component is configured to hingedly attach to the tibial component and rotate relative to the tibial component. The femoral component comprises a medial condyle and a lateral condyle. The medial and lateral condyles have an eccentric sagittal curvature surface configured to rotate and translate on the bearing surface of the tibial component. A method of rotating a hinged knee through a range of flexion is provided. The method fixedly attaches a femoral component to a tibial component. Axial rotation of the femoral component is induced relative to the tibial component when the hinged knee is flexed.

Abstract: Orthopedic assemblies including a tibial component and one of a fixed tibial insert or a rotatable tibial insert. The assemblies may include structure to prevent undesired movement between the tibial component and insert. For example, a retaining tab may be provided on the tibial component that couples to a tab opening on a surface of the tibial insert (either the fixed or rotatable insert). When assembled, the retaining tab may be covered to avoid possible irritation to the patient's surrounding anatomy. The fixed tibial insert may be provided with a tab opening that provides a minimal amount clearance with the retaining tab to help prevent rotation of the fixed tibial insert. The rotatable tibial insert may be provided with a tab opening with more clearance with the retaining tab to allow at least some rotation with the tibial component.

Abstract: Various embodiments of the present invention provide a distal femoral trial that allows a surgeon to cut the central box geometry of a distal femur using an implant-shaped trial. The trial includes a cutting guide that is removable from the trial and adjustable with respect to the trial. The guide is intended to control the depth and direction of the cutting instruments used to prepare the femur for a posterior stabilized implant.

Abstract: Embodiments of the present application relate generally to provisional orthopedic components, and more specifically relate to a trial system including a cam module and a trial femoral component that can be used during joint replacement surgery. The systems and methods of the present application aid a surgeon in the preparation of a patient's bone to receive a permanent implant by providing a system that can be used to guide preparatory box cuts, and that can then be completed with a cam module without removal from the patient's bone so that the same component can be used for the trialing process.

Abstract: A device and method for resecting a distal portion of a femur comprises a distal cutting guide [98], a valgus guide [102], and a variable collet [10]. The distal cutting guide [98] is configured to overlie an anterior portion of the femur and comprises a slot for guiding a cutting tool across a distal portion of the femur. The valgus guide [102] is configured to connect to the distal cutting guide [98]. The valgus guide [102] is configured to align the slot of the distal cutting guide [98] at the proper varus/valgus angle. The variable collet [10] is configured to attach to an intramedullary rod and the valgus guide [102]. The variable collet [10] comprises a port [30] for receiving the intramedullary rod. The port [30] is angularly adjustable with respect to the valgus guide [102] such that adjusting the port [30] adjusts the varus/valgus angle of the distal cutting guide [98].

Abstract: Embodiments of the present invention provide a trial coupler system for use in preparing a patient for an implant. Certain embodiments provide a system including a coupling device (20) and a trial component interface (40) that allows a trial stem (100) to be offset in relation to the respective trial components at an orientation that matches the geometry of the patient. Once the precise positioning is obtained, the trial coupler device (10) can be locked while on the patient's bone so the assembly can be removed without disturbing the desired orientation.

Abstract: Various embodiments of the present invention provide a distal femoral trial that allows a surgeon to cut the central box geometry of a distal femur using an implant-shaped trial. The trial includes a cutting guide that is removable from the trial and adjustable with respect to the trial. The guide is intended to control the depth and direction of the cutting instruments used to prepare the femur for a posterior stabilized implant.

Abstract: Embodiments of the present application relate generally to provisional orthopedic components, and specifically, to a trial system including a cam module (10) and a trial femoral component (100) that can be used during joint replacement surgery. The systems and methods described help a surgeon prepare a patient's bone to receive a permanent implant by providing a system that can be used to guide preparatory box cuts, and that can then be completed with a cam module (10)—without removal from the patient's bone—so that the same component can be used for the trialing process.

Abstract: Patient specific implant technology, in which an outline representation of a portion of an outer surface of a periphery of a bone volume is determined and the outline representation is used in operations related to implant matching. In addition, an instrument may be made to match a perimeter shape of a Patient Specific Knee Implant with features for locating holes in a distal femur such that posts or lugs in a femoral implant locate the femoral implant centered medial-laterally within an acceptable degree of precision to prevent overhang of either the side of the femoral implant over the perimeter of the distal femur bone resections. Further, a two-dimensional outline representation may be segmented into segments that correspond to resection cuts used in fitting an implant on a portion of a bone and operations related to implant matching may be performed based on the segments.

Abstract: A locking instrument assembly for use in conjunction with an intramedullary device is disclosed. The locking instrument assembly includes an inner collet, an outer body, and a knob. The inner collet has a collar and a fastener member. The knob engages the fastener member to press the outer body against the collar. As the knob mates with the fastener member, the collar applies a clamping force to the intramedullary device.

Abstract: Various embodiments of the present invention provide a distal femoral trial that allows a surgeon to cut the central box geometry of a distal femur using an implant-shaped trial. The trial includes a cutting guide that is removable from the trial and adjustable with respect to the trial. The guide is intended to control the depth and direction of the cutting instruments used to prepare the femur for a posterior stabilized implant.

Abstract: Orthopaedic assemblies including a tibial component and one of a fixed tibial insert or a rotatable tibial insert. The assemblies may include structure to prevent undesired movement between the tibial component and insert. For example, a retaining tab may be provided on the tibial component that couples to a tab opening on a surface of the tibial insert (either the fixed or rotatable insert). When assembled, the retaining tab may be covered to avoid possible irritation to the patient's surrounding anatomy. The fixed tibial insert may be provided with a tab opening that provides a minimal amount clearance with the retaining tab to help prevent rotation of the fixed tibial insert. The rotatable tibial insert may be provided with a tab opening with more clearance with the retaining tab to allow at least some rotation with the tibial component.