Abstract: A patella drilling system includes a clamp and a patella drill guide. The clamp includes an arm with a pointed tip that is received in a dimple on the surface of the patella drill guide and another arm with a bone-gripping member spaced from the tip. The clamp is used to hold the patella drill guide firmly against the resected posterior surface of the patella while the surgeon drills into the patella to form holes for mounting pegs on the implant. The clamp may allow the patella drill guide to be pivoted while clamped so that the orientations of the guide bores may be optimized. The system includes an optional cap that may be used on the pointed tip of the clamp to hold the implant firmly in place while the bone cement sets.

Abstract: A knee prosthesis system for total knee replacement procedures includes a plurality of distinctly-sized femoral components, a plurality of distinctly-sized fixed tibial components, a plurality of distinctly-sized mobile tibial components, a plurality of fixed inserts, and a plurality of mobile inserts. Each of the mobile inserts is sized and shaped such that each may be optimally matched to one of the femoral components and may be used with any one of the mobile tibial components. Each of the fixed inserts is sized and shaped such that each may be optimally matched to one of the femoral components and may be used with any one of the fixed tibial components.

Abstract: A patella drill guide includes a base with a flat patella bone-facing surface, a drill guide bore extending through the base, a cantilever spring member and a bone-gripping member. The cantilever spring member biases the bone-gripping member and the flat patella bone-facing surface toward each other. Flexing the cantilever spring member moves the bone-gripping member away from the flat patella bone-facing surface so that the drill guide can be placed on the patella. When the cantilever spring member is released, the patella is clamped between the bone-gripping member and the flat patella bone-facing surface. The drill guide may have sizing indicia and may be part of a kit including trial components to be mounted to the drill guide.

Abstract: A patella resection assembly comprises a handle, slide member and two claw members. The slide member is movably mounted on the handle and includes two diverging arms. Inner edges of the diverging arms contact outer edges of the claw members so that distal movement of the slide member causes the claw members to move toward each other and close around a patella. The claw members and slide member have teeth for grasping the patella as the claw members move together. The claw members also have flat co-planar surfaces for guiding the path of a saw blade during resection of the patella.

Abstract: A method of surgically preparing a patella for implantation of a patella prosthetic component is disclosed.

Abstract: An orthopaedic surgical instrument assembly including a handle and a plurality of surgical tools configured to be selectively coupled with the handle. The handle includes a housing and a lever moveably coupled to the housing. Each surgical tool of the plurality of surgical tools includes a first clamping element and a second clamping element configured to move relative to the first clamping element. The second clamping element is configured to be coupled to the lever such that moving the lever relative to the housing advances the second clamping element toward the first clamping element to clamp a bone of a patient.

Abstract: An orthopaedic surgical instrument that includes a patella resection guide is disclosed. The patella resection guide includes a body having a substantially planar upper surface that defines a patella cutting guide surface and a first jaw having a first tooth, and a second jaw positioned opposite the first jaw. The second jaw is movable relative to the first jaw and includes a second tooth extending toward the first tooth that defines an axis along which the second jaw is moveable relative to the first jaw. The patella cutting guide surface defines a resection plane that extends through a patient's patella when the patella is positioned between the first jaw and the second jaw.

Abstract: An orthopaedic surgical instrument includes a patella drill guide having a first bracket, a second bracket coupled to the first bracket and moveable relative to the first bracket. The second bracket includes a drill plate having a plurality of guide holes defined therein.

Abstract: A patella resection assembly comprises a modular handle and claw member. The claw member is reversibly mountable on the handle so that the same modules may be used to resect the patellae of both the right and the left knees. The handle has an adjustable member that carries a bone-gripping member. Linear movement of the adjustable member allows the same patella resection assembly to be used to securely grip patellae of various sizes.

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: 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 surgical instrument includes a patella trial and drill guide that may be used to both perform a surgical trial of the patellofemoral joint and guide the surgeon in drilling a number of anchor holes in the patella of the patient.

Abstract: An orthopaedic surgical instrument includes a patella trial and drill guide that may be used to both perform a surgical trial of the patellofemoral joint and guide the surgeon in drilling a number of anchor holes in the patella of the patient.

Abstract: An orthopaedic surgical instrument includes a patella trial and drill guide that may be used to both perform a surgical trial of the patellofemoral joint and guide the surgeon in drilling a number of anchor holes in the patella of the patient.

Abstract: An orthopaedic implant assembly includes a plurality of dome patella components and a plurality of anatomic patella components. Each of the dome patella components and the anatomic patella components is interchangeable with a plurality of femoral components.

Abstract: An orthopaedic implant includes a patella component having a posterior bearing surface configured to articulate with the femoral condyles of a femur, and an anterior surface having a number of pegs extending outwardly therefrom. The superior edge of the patella component is thickened relative to conventional dome-shaped patella components.

Abstract: A patella resection assembly comprises a handle, slide member and two claw members. The slide member is movably mounted on the handle and includes two diverging arms. Inner edges of the diverging arms contact outer edges of the claw members so that distal movement of the slide member causes the claw members to move toward each other and close around a patella. The claw members and slide member have teeth for grasping the patella as the claw members move together. The claw members also have flat co-planar surfaces for guiding the path of a saw blade during resection of the patella.

Abstract: An orthopaedic implant assembly includes a plurality of dome patella components and a plurality of anatomic patella components. Each of the dome patella components and the anatomic patella components is interchangeable with a plurality of femoral components.

Abstract: A patella resection assembly comprises a modular handle and claw member. The claw member is reversibly mountable on the handle so that the same modules may be used to resect the patellae of both the right and the left knees. The handle has an adjustable member that carries a bone-gripping member. Linear movement of the adjustable member allows the same patella resection assembly to be used to securely grip patellae of various sizes.

Abstract: A patella drilling system includes a clamp and a patella drill guide. The clamp includes an arm with a pointed tip that is received in a dimple on the surface of the patella drill guide and another arm with a bone-gripping member spaced from the tip. The clamp is used to hold the patella drill guide firmly against the resected posterior surface of the patella while the surgeon drills into the patella to form holes for mounting pegs on the implant. The clamp may allow the patella drill guide to be pivoted while clamped so that the orientations of the guide bores may be optimized. The system includes an optional cap that may be used on the pointed tip of the clamp to hold the implant firmly in place while the bone cement sets.