Stryker Technologies Corporation

Howmedica Osteonics Corporation

Alan Lombardo

Stuart L Axelson, Jr

James V Bono

Kenneth A Krackow

IM revision tools include reamers with depth markings or stops, an impactor-extractor with a coupling for attaching to tools which are inserted into and removed from the IM canal, a resection guide tower to which a cutting block is attached and which includes a notch which serves as both a witness mark and a holder for a femoral collar, a reversible clean-up cutting block with a quick-connect clamp attachable to the guide tower for resecting the distal femur, a selection of spacer blocks for measuring the space between the femur to determine the size of the components to be installed, a multiple cut cutting guide for preparing the femur, a set of 5 and 10 mm trial wedges, a trial stem valgus adapter, femoral sizing indicators which include indications of anterior/posterior offset, a stabilizer box cutting template which is attachable to the multiple cut cutting guide, and anterior/posterior offset adapters for attaching the femoral component to the IM stem.

Methods and tools for femoral intermedullary revision surgery

IM tibia revision tools include a trial stem extender having multiple notches which serve both as depth witness marks and holders for a stop clip, a collection of different sized tibial templates, each template adapted to receive an angular offset positioning guide, a collection of offset bushings, each bushing each bushing having a different offset distance and each being adapted to cooperate with the trial stem extender and the angular offset positioning guide, a neutral bushing for locating the position of the implant boss relative to the tibia and for reaming the tibia to accept the boss of the implant, a fin punch guide and fin punch for preparing the tibia to receive the keel of the tibial component, and a tool for translating the angular offset measurement to the tibial component. Tibial components according to the invention have three parts: the baseplate portion, the offset portion, and the stem portion. Each portion is provided in a variety of sizes and the portions may be mixed and matched according to the measurements made with the tools described above. Methods for using the tools and the tibial components are also disclosed.

Methods and tools for tibial intermedullary revision surgery and associated tibial components

IM revision tools include reamers with depth markings or stops, an impactor-extractor with a coupling for attaching to tools which are inserted into and removed from the IM canal, a resection guide tower to which a cutting block is attached and which includes a notch which serves as both a witness mark and a holder for a femoral or tibial collar, a reversible clean-up cutting block with a quick-connect clamp attachable to the guide tower for resecting the distal femur and separate left and right clean-up cutting blocks for resecting the proximal tibia, a selection of spacer blocks for measuring the space between the tibia and femur to determine the size of the components to be installed, a multiple cut cutting guide for preparing the femur, a set of 5 and 10 mm trial wedges, a trial stem valgus adapter, femoral sizing indicators which include indications of anterior/posterior offset, a stabilizer box cutting template which is attachable to the multiple cut cutting guide, and anterior/posterior offset adapters for attaching the femoral component to the IM stem. The tools according to the invention are modular and can also be used in primary knee arthroplasty without IM fixation. The methods of the invention provide accurate location of bone cuts so that the revision prosthetic is correctly oriented relative the IM canal and the bone cuts.

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Elmwood Park, NJ, United States of America

Alan Lombardo