Abstract: A number of orthopaedic surgical instruments for use in a surgical procedure to prepare a patient's femur to receive an orthopedic prosthesis are disclosed. The tools include guide tools, cutting tools, surgical blocks, and other orthopaedic surgical instruments configured to plan and guide the preparation of the patient's femur. A method of using the orthopaedic surgical instruments is also disclosed.

Abstract: An implantable orthopaedic knee prosthesis assembly includes a femoral component, a stem component, a fastener, and a retention device. The femoral component is configured to be implanted into a distal end of a femur of a patient and includes a stem post having a proximal tapered bore, a distal passageway, and a threaded passageway connecting the proximal tapered bore and the distal passageway. The stem component is configured to taper fit to the femoral component and includes a bore formed therein extending proximally and a threaded aperture defined at a proximal end of the bore. The head of the fastener is configured to be received in the distal passageway, whereas the proximal end of the shaft of the fastener is configured to be positioned in the threaded aperture. The retention device is received in the threaded passageway and prevents the proximal end of the fastener from reentering the threaded passageway.

Abstract: A surgical instrument for use in an orthopaedic arthroplasty procedure includes a shaft having a first end and a second end and an impactor head disposed at the second end of the shaft. The impactor head includes first and second spaced ends, two spaced impaction surfaces disposed at the second end, and a cavity disposed between the impaction surfaces. The cavity is adapted to accommodate posterior-stabilizing spines of at least a first tibial implant component and a second tibial implant component having a size different than a size of the first tibial implant component. Each of the impaction surfaces includes a first section with a contour that conforms to a contour of a bearing surface of the first tibial implant component and a second section with a contour that conforms to a contour of a bearing surface of the second tibial implant component.

Abstract: A method for joint line assembly of an orthopaedic prosthesis assembly includes inserting a tapered post of a first prosthetic component into a tapered bore of a second prosthetic component along a longitudinal axis to secure the first prosthetic component to the second prosthetic component. A shaft of a fastener is advanced along the longitudinal axis through a threaded passageway defined in the second prosthetic component and into the first prosthetic component. The threaded passageway has a greater diameter than a diameter of the shaft. The end of the shaft is threaded into a threaded aperture defined in the first prosthetic component.

Abstract: A tibial orthopaedic prosthesis assembly for use during performance of a knee replacement procedure includes one or more tibial augments configured to be coupled to a tibial tray. Each tibial augment includes an exterior side surface of varying angulation relative to a top surface of the tibial augment.

Abstract: An orthopaedic knee prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The femoral component includes a posterior cam configured to contact a spine of the tibial bearing and a condyle surface curved in the sagittal plane. The radius of curvature of the condyle surface decreases gradually between early-flexion and mid-flexion. Additionally, in some embodiments, the radius of curvature of the condyle surface may be increased during mid-flexion.

Abstract: A posterior stabilized knee orthopaedic prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The tibial bearing includes a spine having a concave cam surface and a convex cam surface. The femoral component includes a posterior cam having a concave cam surface and a convex cam surface. During flexion, the concave cam surface of the posterior cam contacts the convex cam surface of the spine and the convex cam surface of the posterior cam contacts the concave cam surface of the spine.

Abstract: An orthopaedic knee prosthesis includes a femoral component having a condyle surface. The condyle surface is defined by one or more radii of curvatures, which are controlled to reduce or delay the onset of anterior translation of the femoral component relative to a tibial bearing.

Abstract: A mobile tibial assembly includes a tibial tray and a tibial insert. The tibial tray includes a closed track. The tibial insert includes a stem configured to be inserted into the closed track and retained therein. The tibial insert is movable along the closed track once inserted.

Abstract: A posterior stabilized knee orthopaedic prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The tibial bearing includes a spine having a concave cam surface and a convex cam surface. The femoral component includes a posterior cam having a concave cam surface and a convex cam surface. During flexion, the concave cam surface of the posterior cam contacts the convex cam surface of the spine and the convex cam surface of the posterior cam contacts the concave cam surface of the spine.

Abstract: An implantable orthopaedic knee prosthesis includes a femoral component including an articular surface configured to engage a tibial bearing and a laterally-angled trochlear groove defined in the articular surface. The trochlear groove of the femoral component is configured to receive a patella component in a first location at a first degree of flexion and a second location at a second degree of flexion. The second degree of flexion is greater than the first degree of flexion. An arced imaginary line defines a central section of the trochlear groove. When the femoral component is viewed in a first coronal plane extending through the first location, the arced imaginary line has a first radius of curvature. When the femoral component is viewed in a second coronal plane extending through the second location, the arced imaginary line has a second radius of curvature that is less than the first radius of curvature.

Abstract: An orthopaedic knee prosthesis assembly includes a plurality of femoral components. Each component includes a medial condyle and a lateral condyle. When each component is viewed in a coronal plane extending through a distal-most point of the medial condyle and a distal-most point of the lateral condyle, the medial condyle has a medial curved distal-most surface that includes the distal-most point, and a width is defined between the distal-most points of the medial condyle and the lateral condyle. The coronal radius of the distal-most surface of a first component is proportionally greater than the coronal radius of a second component. The coronal radius of the second component is proportionally greater than the coronal radius of a third component. The first component width is proportionally greater than the second component width, and the second component is proportionally greater than the width of the third component.

Abstract: A modular knee prosthesis system includes a femoral component having a stem and a plurality of different sizes of sleeves mountable on the stem. The system is modular, and provides the surgeon with the option of distally offsetting the joint line by selecting the size of sleeve that will provide the desired joint line. The different sizes of sleeves have different axial lengths but share a common geometry along a substantial part of their lengths so that the same bone cavity will accept multiple sizes of sleeves.

Abstract: A modular knee prosthesis system includes a femoral component having a stem, a plurality of different sizes of sleeves mountable on the stem, and a plurality of different sizes of augments mountable on the femoral component. The system is modular, and provides the surgeon with the option of distally offsetting the joint line by selecting the size of sleeve that will provide the desired joint line. The different sizes of sleeves have different axial lengths but share a common geometry along a substantial part of their lengths so that the same bone cavity will accept multiple sizes of sleeves.

Abstract: An orthopaedic surgical instrument system includes a first broach including a first end configured to be separately secured to a handle and a tapered body having a plurality of cutting teeth defined therein, and a second broach including a first end configured to be separately secured to the handle in place of the first broach, a first tapered body extending distally from a second end positioned opposite the first end, and a second tapered body extending distally from the first tapered body. The tapered body of the first broach and the first tapered body of the second broach have a first outer geometry and the second tapered body has a second outer geometry different from the first outer geometry.

Abstract: A fixed-bearing prosthesis includes a femoral component having a medial condyle surface and a lateral condyle surface. The knee prosthesis also includes a bearing having a medial bearing surface configured to articulate with the medial condyle surface of the femoral component, and a lateral bearing surface configured to articulate with the lateral condyle surface of the femoral component. A tibial tray is secured to the bearing. The tibial tray has a platform with an elongated stem extending downwardly from a lower surface thereof. A posterior buttress extends along a posterior section of the perimeter of the tray's platform, and an anterior buttress extends along an anterior section of the perimeter of the tray's platform. Differently-sized tibial trays are interchangeable with differently-sized bearings.

Abstract: A number of orthopaedic surgical instruments are also disclosed. A method, apparatus, and system for fabricating such instruments are also disclosed.

Abstract: An orthopaedic knee prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The femoral component includes a posterior cam configured to contact a spine of the tibial bearing and a condyle surface curved in the sagittal plane. The radius of curvature of the condyle surface decreases gradually between early-flexion and mid-flexion. Additionally, in some embodiments, the posterior cam of the femoral component may include a concave cam surface and a convex cam surface.

Abstract: A posterior stabilized knee orthopaedic prosthesis assembly includes a tibial bearing, a primary femoral component, and a revision femoral component. Each of the primary and revision femoral components is configured to separately articulate with the tibial bearing. However, each of the primary and revision femoral components has different geometry. The primary femoral component includes a posterior cam having a posterior cam surfacing including a concave cam surface and a convex cam surface. The revision femoral component includes a posterior cam having only a convex cam surface.

Abstract: An implantable orthopaedic knee prosthesis includes a component that is configured to be coupled to a surgically-prepared bone. A fixation side of the component includes a fixation surface that has an angled cement pocket formed therein.