Femoral cut guide
AssigneeZimmer, Inc.
InventorsAaron M. Bailey, Kevin S. Cook, Christopher M. Byrd, Prashanth Hegde
Life of this patent
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Abstract
The present disclosure provides a femoral cut guide for preparing a distal femur to receive a prosthetic femoral component of a knee implant. The prosthetic femoral component includes a central box. The femoral cut guide replicates the size and shape of the prosthetic femoral component, such that the femoral cut guide may serve as a trial or provisional component used to reduce and test the prepared knee joint before implanting the final prosthetic femoral component. The femoral cut guide includes a detachable box cut guide for preparing the distal femur to receive the central box of the prosthetic femoral component.
Claims21
A femoral cut guide for preparing a distal femur to receive a prosthetic femoral component, the prosthetic femoral component including a first articulating surface and an opposing first bone-contacting surface that rests against the distal femur, the first bone-contacting surface including a first anterior portion, a first distal portion, and a first posterior portion, the prosthetic femoral component further including a box that projects proximally from the first distal portion of the first bone-contacting surface, the femoral cut guide comprising:
- a body having a second articulating surface that is shaped to replicate the first articulating surface and a second bone-contacting surface that is shaped to replicate the first bone-contacting surface, the second bone-contacting surface including a second anterior portion, a second distal portion, and a second posterior portion;
- and
- a box cut guide removably coupled to the body, the box cut guide including a reference surface located in a cut plane, the reference surface located proximally of the second distal portion of the second bone-contacting surface when the box cut guide is coupled to the body, whereby the reference surface of the box cut guide guides a cutting tool in the cut plane to remove bone from the distal femur so as to accommodate the box when the prosthetic femoral component is secured to the distal femur.
A femoral cut guide for preparing a distal femur to receive a prosthetic femoral component, the prosthetic femoral component including a first articulating surface and an opposing first bone-contacting surface that rests against the distal femur, the prosthetic femoral component further including a central box that projects proximally from the first bone-contacting surface, the femoral cut guide comprising:
- a body having a second articulating surface that is shaped to replicate the first articulating surface and a second bone-contacting surface that is shaped to replicate the first bone-contacting surface, the body including a medial side and a lateral side that define a central opening therebetween;
- and
- a box cut guide removably coupled to the body, the box cut guide including at least one elongate guide slot that is sized to receive a cutting tool therein, the elongate guide slot extending from the medial side to the lateral side of the body across the central opening in the body when the box cut guide is coupled to the body, whereby the box cut guide guides the cutting tool through the elongate guide slot and across the central opening in the body to remove bone from the distal femur so as to accommodate the central box when the prosthetic femoral component is secured to the distal femur.
A method of preparing a distal femur to receive a prosthetic femoral component, the prosthetic femoral component including a first articulating surface, an opposing first bone-contacting surface, and a box that projects proximally from the first bone-contacting surface to a top surface, the method comprising the steps of:
- providing a body having a second articulating surface that is shaped to replicate the first articulating surface and a second bone-contacting surface that is shaped to replicate the first bone-contacting surface;
- positioning the second bone-contacting surface of the body against the distal femur;
- attaching a box cut guide to the body, the box cut guide including a reference surface located in a cut plane;
- guiding a cutting tool across the reference surface of the box cut guide to prepare a resected surface of the distal femur, the resected surface of the distal femur located in the cut plane;
- removing the body from the distal femur;
- and
- positioning the first bone-contacting surface of the prosthetic femoral component against the distal femur with the top surface of the box bordering the resected surface of the distal femur.
Dependencies are inferred from the claim text.