Revision knee arthroplasty methods and instruments
AssigneeZimmer, Inc.
InventorsTim Yoko, Joseph C. Capek, Amanda Szalkowski, Jeffery A. VanDiepenbos
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Abstract
According to one example, a for revision knee arthroplasty is disclosed. According to this example, the method can include shaping a bone of a patient to create one or more recesses therein, selecting a stem provisional, disposing the stem provisional within the one or more recesses, and assembling in vivo the stem provisional with both a first provisional component configured to simulate a shape of one of a tibial tray implant or a femoral implant and a second provisional component configured to simulate a shape of at least one of a sleeve component, a cone component or a keel component of an implant.
Claims12
A method for revision knee arthroplasty comprising:
- shaping a bone of a patient to create one or more recesses therein;
- selecting a stem provisional;
- disposing the stem provisional within the one or more recesses;
- and
- assembling in vivo the stem provisional with both a first provisional component configured to simulate a shape of one of a tibial tray implant or a femoral implant and a second provisional component configured to simulate a shape of at least one of a sleeve component, a cone component or a keel component of an implant;
- wherein the step of assembling includes:
- engaging a fastener to thread the fastener into a threaded recess of the stem provisional;
- and
- passing a tool through a passage in the fastener to engage the stem provisional distal of the threaded recess.
A method for revision knee arthroplasty comprising:
- shaping a bone of a patient to create one or more recesses therein;
- selecting a stem provisional;
- disposing the stem provisional within the one or more recesses;
- assembling in vivo the stem provisional with both a first provisional component configured to simulate a shape of one of a tibial tray implant or a femoral implant and a second provisional component configured to simulate a shape of at least one of a sleeve component, a cone component or a keel component of an implant
- constructing an implant assembly based upon the positions of the first provisional component, the second provisional component and the stem provisional;
- coupling a multi-purpose handle to one or more of the second provisional component and an offset broach;
- and
- extracting the offset broach from the bone using movement of a slap hammer of the multi-purpose handle, wherein the offset broach has a cutting surface along only a first side thereof and a second side thereof opposing the first side is configured to receive and interface with a reamer, wherein the offset broach is configured to offset a first portion of the one or more recesses relative to a second portion of the one or more recesses.
A method for revision knee arthroplasty comprising:
- shaping a bone of a patient to create one or more recesses therein;
- selecting a stem provisional;
- disposing the stem provisional within the one or more recesses;
- and
- assembling in vivo the stem provisional with both a first provisional component configured to simulate a shape of one of a tibial tray implant or a femoral implant and a second provisional component configured to simulate a shape of at least one of a sleeve component, a cone component or a keel component of an implant, wherein shaping the bone of the patient to create one or more recesses therein comprises:
- performing a reaming of the bone with a tilt reamer having distal nose portion and a cutting portion with a back angled taper having a decreasing diameter as measured distal-to-proximal along a longitudinal axis of the tilt reamer.
Dependencies are inferred from the claim text.