Wright Medical Technology, Inc.

Dennis J Buchanan

Stephen Edward White

Robert D Paxson

Joseph Michael Ferrante

J David Blaha

Kevin B Hayes

Irina A Timmerman

Michael Earl Kaufman

A knee prosthesis for replacing at least a portion of a knee joint between the distal end of a femur and the proximal end of a tibia. The knee prosthesis includes a tibial component for mounting to the proximal end of the tibia, the tibial component including a proximal surface having a semispherical medial cavity and a lateral cavity; and a femoral component for mounting to the distal end of the femur, the femoral component including a semispherical medial condylar portion for pivotally coacting with the semispherical medial cavity of the tibial component and including a semispherical lateral condylar portion for movably coacting with the lateral cavity of the tibial component; the semispherical medial condylar portion being substantially congruent with the semispherical medial cavity of the tibial component so that substantially complete surface-to-surface contact between the semispherical medial cavity of the tibial component and the semispherical medial condylar portion of the femoral component is provided throughout the range of flexion of the knee joint.

Medial pivot knee prosthesis

A knee prosthesis including a tibial component for mounting to the proximal end of a tibia, and a femoral component for mounting to the distal end of a femur. At least the face surface of the medial condylar portion of the femoral component may be preferably substantially congruent with the face surface of a medial cavity in the upper surface of the tibial component so that substantially complete surface-to-surface contact between the face surface of the medial cavity in the upper surface of the tibial component and the face surface of the medial condylar portion of the femoral component is provided throughout a significant portion of the range of flexion of the knee joint. The tibial component may include a base member, an articular bearing member movably positioned on the upper surface of the base member, and structure for restricting the movement of the lateral portion of the articular bearing member relative to the base member to allow a swinging motion thereof relative to the medial portion of the articular bearing member.

Knee prosthesis

An article for preparing a bone to receive a distal implant includes a base having longitudinal axis, a support surface thereon, and seating surfaces for seating the base along a long axis of the bone. A pair of connected brackets are mounted on the base. A first of the brackets is axially adjustable relative to the longitudinal axis of the base and a second bracket is radially adjustable relative to the base. One of the brackets is operatively connected to the support surface and the other of the brackets includes a single point connecting mechanism for connecting a plurality of bone preparing devices to the base at a single point reference axially and radially adjustable relative to the base.

External alignment system for preparing a femur for an implant

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Memphis, TN, United States of America

Dennis J Buchanan