Method for simulating prosthetic implant selection and placement
First Claim
1. A method for simulating prosthetic implant selection and placement in an anatomical structure using a computer-assisted surgery system, comprising the steps of:
- generating a virtual model of the anatomical structure;
registering the anatomical structure with the virtual model of the anatomical structure in the computer-assisted surgery system;
determining a mechanical axis correction of the anatomical structure;
inputting the mechanical axis correction into the computer-assisted surgery system;
determining soft tissue balance in the anatomical structure;
inputting the soft tissue balance into the computer-assisted surgery system;
selecting a simulated implant component corresponding to the mechanical axis correction and the soft tissue balance;
simulating implantation of the simulated implant component;
verifying that the simulated implant component provides the mechanical axis correction and the soft tissue balance; and
selecting an actual implant component corresponding to the simulated implant component if the simulated implant component provides the mechanical axis correction and the soft tissue balance.
1 Assignment
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Accused Products
Abstract
A method and apparatus are provided for preoperatively or intraoperatively determining prosthetic implant selection and placement to achieve acceptable alignment and spacing of anatomical structures affected by the prosthetic implant and to achieve acceptable soft tissue balance proximate the prosthetic implant without requiring trial-and-error selection of implant size and placement during surgery. In one exemplary embodiment, the method and apparatus of the present invention are used to choose appropriate tibial, meniscal and femoral prosthetic components to achieve acceptable alignment, acceptable spacing of the tibia and femur, and acceptable soft tissue balance over a full range of motion of the knee.
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Citations
20 Claims
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1. A method for simulating prosthetic implant selection and placement in an anatomical structure using a computer-assisted surgery system, comprising the steps of:
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generating a virtual model of the anatomical structure;
registering the anatomical structure with the virtual model of the anatomical structure in the computer-assisted surgery system;
determining a mechanical axis correction of the anatomical structure;
inputting the mechanical axis correction into the computer-assisted surgery system;
determining soft tissue balance in the anatomical structure;
inputting the soft tissue balance into the computer-assisted surgery system;
selecting a simulated implant component corresponding to the mechanical axis correction and the soft tissue balance;
simulating implantation of the simulated implant component;
verifying that the simulated implant component provides the mechanical axis correction and the soft tissue balance; and
selecting an actual implant component corresponding to the simulated implant component if the simulated implant component provides the mechanical axis correction and the soft tissue balance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for simulating prosthetic implant selection and placement in a knee joint using a computer-assisted surgery system, the knee joint including a femur and a tibia, comprising the steps of:
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generating a virtual model of the knee joint;
registering the knee joint with the virtual model of the knee joint in the computer-assisted surgery system;
determining a mechanical axis correction of the knee joint;
inputting the mechanical axis correction into the computer-assisted surgery system;
determining soft tissue balance in the knee joint;
inputting the soft tissue balance into the computer-assisted surgery system;
selecting a simulated implant component corresponding to the mechanical axis correction and the soft tissue balance;
simulating implantation of the simulated implant component;
verifying that the simulated implant component provides the mechanical axis correction and the soft tissue balance; and
selecting an actual implant component corresponding to the simulated implant component if the simulated implant component provides the mechanical axis correction and the soft tissue balance. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification