Patient-adapted and improved orthopedic implants, designs, and related tools
First Claim
Patent Images
1. A tibial implant for a knee arthroplasty in a patient, the tibial implant comprising:
- (a) a tibial tray sized and shaped generally for placement on a proximal surface of a tibia of the patient and having at least one insert locking mechanism;
(b) a first insert comprising a first reciprocal locking mechanism, a first bottom surface for engaging a surface of the tibial tray, a first articular surface portion generally opposite the first bottom surface, and a first thickness extending in a generally perpendicular direction between the first bottom surface and the first articular surface portion; and
(c) a second insert comprising a second reciprocal locking mechanism, a second bottom surface for engaging a surface of the tibial tray, a second articular surface portion generally opposite the second bottom surface, and a second thickness extending in a generally perpendicular direction between the second bottom surface and the second articular surface portion;
wherein the first thickness is greater than the second thickness, wherein the first articular surface portion or the second articular surface portion, or both, includes patient-adapted sagittal radii or curvature.
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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.
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Citations
66 Claims
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1. A tibial implant for a knee arthroplasty in a patient, the tibial implant comprising:
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(a) a tibial tray sized and shaped generally for placement on a proximal surface of a tibia of the patient and having at least one insert locking mechanism; (b) a first insert comprising a first reciprocal locking mechanism, a first bottom surface for engaging a surface of the tibial tray, a first articular surface portion generally opposite the first bottom surface, and a first thickness extending in a generally perpendicular direction between the first bottom surface and the first articular surface portion; and (c) a second insert comprising a second reciprocal locking mechanism, a second bottom surface for engaging a surface of the tibial tray, a second articular surface portion generally opposite the second bottom surface, and a second thickness extending in a generally perpendicular direction between the second bottom surface and the second articular surface portion; wherein the first thickness is greater than the second thickness, wherein the first articular surface portion or the second articular surface portion, or both, includes patient-adapted sagittal radii or curvature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A tibial implant for knee arthroplasty in a patient, the tibial implant comprising:
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(a) a medial tibial insert comprising (i) a substantially planar inner surface for engaging a medial tibial tray face and (ii) an articular surface comprising an articular surface plateau and disposed therein a curved portion for opposing an articular surface of a medial femoral condyle; and (b) a lateral tibial insert comprising (i) a substantially planar inner surface for engaging a lateral tibial tray face and (ii) an articular surface comprising an articular surface plateau and disposed therein a curved portion for opposing an articular surface of a lateral femoral condyle; wherein the distance from the inner surface to the articular surface of the medial tibial insert is different from the distance from the inner surface to the articular surface of the lateral tibial insert, and wherein the articular surface of the medical tibial insert, or the articular surface of the lateral tibial insert, or both, includes patient-adapted sagittal radii or curvature. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method for implanting a knee implant in a patient'"'"'s knee joint, the method comprising the steps of:
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(a) preparing a proximal end of a tibia to receive an implant including at least one tibial implant; and (b) inserting the at least one tibial implant onto the prepared proximal end of the tibia such that a first articular surface of the at least one tibial implant engages a first articular surface of a femoral implant and a second articular surface of the at least one tibial implant engages a second articular surface of the femoral implant; wherein the first articular surface is higher than the second articular surface relative to an anatomical axis of the tibia, wherein the first articular surface, or the second articular surface, or both, includes patient-adapted sagittal radii or curvature. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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65. A kit for implanting a tibial implant in a patient in need of knee replacement, the kit comprising:
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(a) a tibial tray comprising a first surface for affixing the tray to the patient'"'"'s tibia and an opposing second surface for engaging a medial tibial insert; and (b) two or more medial tibial inserts having different thicknesses from which to select one medial tibial insert for engaging with the tibial tray, wherein the two or more medial tibial inserts include an articular surface that has patient-adapted sagittal radii or curvature.
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66. A kit for implanting a tibial implant in a patient in need of knee replacement, the kit comprising:
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(a) a tibial tray comprising a first surface for affixing the tray to the patient'"'"'s tibia and an opposing second surface for engaging a lateral tibial insert; and (b) two or more lateral tibial inserts having different thicknesses from which to select one lateral tibial insert for engaging with the tibial tray, wherein the two or more lateral tibial inserts include an articular surface that has patient-adapted sagittal radii or curvature.
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Specification