Mathys Ag Bettlach

Mathys Medical Ltd.

Mathys Medizinaltechnik Ag

Christoph Fankhauser

Daniel Delfosse

Walter Supper

Joseph David Lipman

Russell F Warren

Timothy M Wright

Donald L Bartel

Beat Grunder

Tobias Wyss

Ulrich Wehrli

René Von Burg

Thomas L Wickiewicz

Frank Hoffman

A knee joint endoprosthesis () for forming an articulation between a femur and a tibia includes a femur component (), which is connected to the femur, a tibia component (), which is connected to the tibia, and an intermediate element () which is mounted between the tibia component () and the femur component (). This intermediate element lies against the femur component () with a modular sliding surface () which includes a lateral sliding surface () and a medial sliding surface (), and can be connected in a releasable manner to the tibia component (). The lateral sliding surface () and the medial sliding surface () of the intermediate element () have different sagittal cross-sectional profiles.

Joint prosthesis with intermediate element having differently formed sliding surfaces

A ligament tensing device () for activating a ligament and/or capsule system during implantation of a joint implant, comprising a base body () having a first lug () with a distal bearing surface () resting upon a first bone, and a second lug () resting upon a second bone with a proximal bearing surface () thereof. The second lug () is displaceable in an anterior-posterior and/or medial-lateral direction parallel to the first lug ().

Ligament tensing device with displaceable lug

A device for implanting marking bodies into a bone is provided in the form of forceps whereby comprising a medial forceps handle, a lateral forceps handle, a medial forceps limb, a lateral forceps limb, and a spring element. The spring element acts upon the medial forceps handle and upon the lateral forceps handle, and the medial forceps limb and the lateral forceps limb can be displaced parallel relative to one another by means of a four-bar linkage for ejecting the marking bodies. A magazine containing the marking bodies can be slid onto a magazine holding fixture situated on the lateral forceps limb.

Device for implanting marking bodies

A prosthesis for repairing a knee is made with an insert sandwiched between a femoral component and a tibial tray. The parts are shaped so that both the femoral component and the tibial tray will slidingly interface with the insert during motion of the knee. At regions where the femoral component interfaces with the insert during extension and during an initial range of flexion of the knee, the femoral component's radius of curvature (R) for flexion rotation is larger than its radius of curvature (R) for varus/valgus rotation. In a preferred embodiment, the surface of the tibial tray is convex and spherically curved, and the insert is free to move in both the posterior-anterior direction and the medial-lateral direction with respect to the tibial tray.

Self-aligning knee prosthesis

Growing community of inventors

Solothurn, Switzerland

Christoph Fankhauser