Patient-adapted and improved articular implants, designs and related guide tools
First Claim
1. A method of designing a patient-specific bone-preserving femoral implant having bone-cut surfaces for engaging corresponding resection cut surfaces on a patient'"'"'s knee, the method comprising the steps of:
- determining a size, orientation, and/or position of a set of one or more bone-cut surfaces based at least in part on the shape of a patient'"'"'s knee such that the set of one or more bone-cut surfaces minimizes the amount of bone to be resected from the patient'"'"'s knee during implantation of the femoral implant; and
incorporating the set of one or more bone-cut surfaces into the design of a femoral implant, such that the set of one or more bone-cut surfaces is included on a bone-facing side of the implant.
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Accused Products
Abstract
Methods and devices are disclosed relating improved articular models, implant components, and related guide tools and procedures. In addition, methods and devices are disclosed relating articular models, implant components, and/or related guide tools and procedures that include one or more features derived from patient-data, for example, images of the patient'"'"'s joint. The data can be used to create a model for analyzing a patient'"'"'s joint and to devise and evaluate a course of corrective action. The data also can be used to create patient-adapted implant components and related tools and procedures.
365 Citations
48 Claims
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1. A method of designing a patient-specific bone-preserving femoral implant having bone-cut surfaces for engaging corresponding resection cut surfaces on a patient'"'"'s knee, the method comprising the steps of:
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determining a size, orientation, and/or position of a set of one or more bone-cut surfaces based at least in part on the shape of a patient'"'"'s knee such that the set of one or more bone-cut surfaces minimizes the amount of bone to be resected from the patient'"'"'s knee during implantation of the femoral implant; and incorporating the set of one or more bone-cut surfaces into the design of a femoral implant, such that the set of one or more bone-cut surfaces is included on a bone-facing side of the implant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of selecting a bone-preserving femoral implant having bone-cut surfaces for engaging corresponding resection cut surfaces on a patient'"'"'s knee, the method comprising the steps of:
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determining a desired implant configuration for a femoral implant based at least in part on image data of at least a portion of a patient'"'"'s knee, wherein the desired implant configuration minimizes a total bone resection volume of femoral bone to be resected from the patient'"'"'s knee during implantation of the femoral implant; selecting a femoral implant design from a library of femoral implant designs based at least in part on the determined desired implant configuration, wherein the selected femoral implant design includes on its bone-facing side a set of bone-cut surfaces having a configuration that results in an actual bone resection volume that approximates the total bone resection volume. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of selecting and/or designing for a patient a bone-preserving articular implant having an outer articular surface and an inner bone-facing surface, the method comprising the steps of:
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(a) deriving a dimension of the outer articular surface of the articular implant by selecting one or more desired post-implantation distances between one or more patient-specific anatomical landmarks and the outer articular surface of the articular implant; (b) selecting a desired minimum thickness for the articular implant; (c) selecting and/or designing one or more surface facets on the inner, bone-facing surface of the articular implant, together with planning one or more corresponding resection cuts to the patient'"'"'s bone, to generate the articular implant having the desired one or more post-implantation distances and having at least the desired minimum thickness. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method of selecting and/or designing an articular implant for a particular patient, the method including the steps of:
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(a) virtually aligning an extremity of the particular patient; (b) planning one or more resection cuts to one or more of the patient'"'"'s articular surfaces and selecting and/or designing one or more surface facets on the inner, bone-facing surface of the articular implant in order to maintain the virtual alignment and thereby enhance a normal post-implantation mechanical axis for the particular patient; (c) optimizing a location or orientation of a portion of the one or more surface facets on the inner, bone-facing surface of the articular implant so as to achieve maximum bone preservation. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41)
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42. A method for making an articular implant for a single patient in need of an articular implant replacement procedure, the method comprising:
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(a) identifying unwanted tissue from one or more images of the patient'"'"'s joint; (b) identifying a combination of resection cuts and implant features that remove the unwanted tissue and also minimize resected bone; and (c) selecting and/or designing a combination of resection cuts and/or implant features that provide removal of the unwanted tissue and minimize resected bone. - View Dependent Claims (43, 44, 45, 46)
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47. A method of revising a total knee replacement implant, the method comprising:
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(a) removing a first total-knee replacement implant implanted on the medial condyle and lateral condyles of a patient'"'"'s knee; (b) preparing the patient'"'"'s knee to receive a primary total knee replacement implant; and (c) implanting the primary total knee replacement implant on the patients knee such that the primary total knee replacement implant forms medial and lateral condylar articular surfaces and a trochlear articular surface. - View Dependent Claims (48)
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Specification