Osteonics Corp.

Kenneth H Trimmer

Thomas G Wilson

John S Jacober

Lawrence G Morawa

Andrij J Nedilsky

A tibial resection guide is aligned with the direction of the mechanical axis of the leg of a recipient of a total knee prosthesis through the use of a proximal alignment member at the proximal portion of an external tibial alignment shaft coupled to the tibia, the proximal alignment member having a guideway for the reception of an external alignment rod affixed to the distal femur of the recipient and so as to extend in the direction of the mechanical axis.

Apparatus and method for the alignment of a total knee prosthesis

Apparatus and method for the preparation of the proximal tibia for resection at a selected resection level utilize an external alignment shaft having an exposed upper end for the reception of a tibial resection guide over the exposed upper end for movement downwardly along the alignment shaft, securement to the alignment shaft at a resection location along the alignment shaft, and affixation to the proximal tibia at the resection level, the alignment shaft having an upper rod detachable from a lower tubular member for withdrawal of the upper rod from the lower tubular member, and for withdrawal upwardly from the tibial resection guide while the tibial resection guide is maintained affixed to the proximal tibia at the resection location, for full access of the tibial resection guide to a resection device to accomplish resection of the proximal tibia. A head at the upper end of the alignment shaft is anchored to the proximal tibia with fixation pins mounted for movement relative to the head for facilitating advancement and retraction of the fixation pins without disturbing the location of the tibial resection guide. The tibial resection guide is coupled to the alignment shaft with a securing member which projects sideways from the tibial resection guide so as to facilitate access to the tibial resection guide by the resection device. Selective attachment and detachment of a stylus assembly and the tibial resection guide is facilitated by a quick-connect mechanism, which assures positive location of a stylus for accurate location of the resection level.

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Waldwick, NJ, United States of America

Kenneth H Trimmer