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US 8,409,210 B2Granted
Total knee arthroplasty method
AssigneeJMEA Corporation
InventorsMohit K. Bhatnagar, Jack Y. Yeh
Life of this patent
Estimating the term…
Abstract
A total knee arthroplasty (TKA) set that includes a universal cutting jig for shaping the distal femur is disclosed, along with corresponding TKA methods. The universal cutting jig may be used to create a shaped femur that can receive multiple and different TKA implant designs. A universal high flexion knee system adapted for left-right use is also disclosed.
Claims21
A method for performing a total knee replacement procedure comprising:
- preparing a distal femur by cutting the distal femur with a cutting device that is guided by a jig, and eventually forming a prepared distal femur with a first distal surface;
- selecting a selected knee prosthesis from a group of candidate knee prostheses, wherein the group of candidate knee prostheses includes candidate femoral components having similar proximal sides and having substantially different distal sides, and wherein the proximal sides are configured to engage the first distal surface of the prepared distal femur;
- and
- associating the femoral component of the selected knee prosthesis with the prepared distal femur,
- wherein the group of candidate knee prostheses includes candidate tibial components,
- wherein each candidate tibial component has an inner surface shaped to receive a distal surface of one of the candidate femoral components, but not distal surfaces of the remaining candidate femoral components,
- wherein the candidate femoral components are configured to be used with either a left femur or a right femur,
- wherein the candidate tibial components are configured to be used with either a left tibia or a right tibia, and
- wherein the candidate femoral components are configured to engage their respective candidate tibial components with a flexion angle of greater than 120 degrees.
6 more elements
A method for performing a total knee replacement procedure comprising:
- selecting a universal cutting jig from a plurality of universal cutting jigs, wherein the plurality of universal cutting jigs includes a single type of universal cutting jig for each femur size, wherein each of the plurality of universal cutting jigs is configured to guide a cutting device to prepare a distal femur, and wherein the selected universal cutting jig corresponds to a particular femur size of a patient;
- using the selected universal cutting jig to prepare a distal femur of the patient;
- selecting, from among a plurality of femoral components, a femoral component suitable for the patient, wherein the plurality of femoral components includes a plurality of femoral components for each femur size, wherein each of the plurality of femoral components has a distinct distal side and a uniform proximal side configured to engage a distal femur prepared by a corresponding universal cutting jig, wherein each of the plurality of femoral components is configured to be used with either a left femur or a right femur, and wherein the selected femoral component has a uniform proximal side configured to engage the patient's distal femur prepared by the selected universal cutting jig corresponding to the particular femur size of the patient;
- attaching the selected femoral component to the prepared distal femur of the patient;
- selecting, from among a plurality of tibial components, a tibial component having a distinct inner surface configured to engage the distinct distal side of the selected femoral component, wherein the plurality of tibial components includes a plurality of tibial components for each femur size, wherein each of the plurality of tibial components has a distinct inner surface shaped to engage a distinct distal side of a corresponding femoral component at a flexion angle of greater than 120 degrees, and wherein each of the plurality of tibial components is configured to be used with either a left tibia or a right tibia;
- and
- implanting the selected tibial component in the patient such that the distinct inner surface of the selected tibial component engages the distinct distal side of the selected femoral component.
4 more elements
A method for storing, managing, and implanting total knee replacement systems comprising:
- using a universal cutting jig to prepare a distal femur surface on a patient, wherein the universal cutting jig is configured to guide a cutting device to cut a distal femur surface of a femur of a given femur size, and wherein the universal cutting jig is configured to be used on either a left femur or a right femur;
- selecting, from among a stock of a plurality of types of femoral components, a femoral component of a type suitable for the patient, wherein each of the femoral components of the stock of the plurality of types of femoral components is configured for the given femur size, and wherein each femoral component type has a uniform proximal side configured to engage the prepared distal femur surface, has a distinct distal side, and is configured to be used on either a left femur or a right femur;
- attaching the selected femoral component to the prepared distal femur surface of the patient;
- selecting, from among a stock of a plurality of types of tibial components, a tibial component of a type having a distinct inner surface matching the distinct distal side of the selected femoral component, wherein each of the tibial components of the stock of the plurality of types of tibial components is configured for the given femur size, and wherein each tibial component type has a distinct inner surface shaped to engage the distinct distal side of a corresponding femoral component type at a flexion angle of greater than 120 degrees and is configured to be used with either a left tibia or a right tibia;
- and
- implanting the selected tibial component in the patient such that the distinct inner surface of the selected tibial component engages the distinct distal side of the selected femoral component.
3 more elements
Dependencies are inferred from the claim text.