Smith + Nephew

University of Pennsylvania

Corin Limited

Johan Bellemans

Jason Karl Otto

Brian William McKinnon

Michael D Ries

Jan Victor

Timothy Wilton

Dean Hughes

Jonathan P Garino

Michael Dean Hughes

Simon Collins

Johnathan Garino

Brian W Mckinnon

Ian James Emslie

Johanthan Garino

Jan Maria Karel Victor

Andrew Craig Sutcliffe

Ian James Elmslie

Harsimran Sabharwal

Ph D Jan Victor

Brain W Mckinnon

Ph D Michael Ries

Ph D Jonathan Garino

Gianluca Girotti

Knee prostheses that more faithfully replicate the structure and function of the human knee joint in order to provide, among other benefits: greater flexion of the knee in a more natural way by promoting or accommodating internal tibial rotation, replication of the natural screw home mechanism, and controlled articulation of the tibia and femur respective to each other in a natural way. Such prostheses may include an insert component disposed between a femoral component and a tibial component, the insert component featuring, among other things, a reversely contoured posterolateral bearing surface that helps impart internal rotation to the tibia as the knee flexes. Other surfaces can be shaped using iterative automated techniques that allow testing and iterative design taking into account a manageable set of major forces acting on the knee during normal functioning, together with information that is known about natural knee joint kinetics and kinematics.

High performance knee prostheses

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.

Femoral sizing jig, femur resecting system, and method

Knee prostheses featuring components that more faithfully replicate the structure and function of the human knee joint in order to provide, among other benefits: greater flexion of the knee in a more natural way by promoting or at least accommodating internal tibial rotation in a controlled way, replication of the natural screw home mechanism, and controlled articulation of the tibia and femur respective to each other in a more natural way. In a preferred embodiment, such prostheses include an insert component disposed between a femoral component and a tibial component, the insert component preferably featuring among other things a reversely contoured posterolateral bearing surface that helps impart internal rotation to the tibia as the knee flexes. Other surfaces can also be specially shaped to achieve similar results, preferably using iterative automated techniques that allow testing and iterative design taking into account a manageable set of major forces acting on the knee during normal functioning, together with information that is known about natural knee joint kinetics and kinematics.

High performance knee prosthesis

Femoral prostheses with lateral buttress for patella

Knee prostheses with convex portion on tibial lateral articular surface

Knee prostheses with convex slope on portion of tibial articular surface

High performance knee prostheses with converging anterior and posterior portions

High performance knee prostheses with posterior cam

High performance femoral knee prostheses

Growing community of inventors

Langdorp, Belgium

Johan Bellemans