Patient-Adapted and Improved Orthopedic Implants, Designs, and Related Tools
First Claim
1. A tibial implant for a knee arthroplasty, the tibial implant comprising:
- (a) a tibial tray sized and shaped generally for placement on a proximal surface of a tibia of a 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 base surface, and a first thickness extending in a generally perpendicular direction between the first bottom surface and the first articular surface; 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 base surface, and a second thickness extending in a generally perpendicular direction between the second bottom surface and the second articular surface;
wherein the first thickness is greater than the second thickness.
13 Assignments
0 Petitions
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.
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Citations
94 Claims
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1. A tibial implant for a knee arthroplasty, 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 a 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 base surface, and a first thickness extending in a generally perpendicular direction between the first bottom surface and the first articular surface; 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 base surface, and a second thickness extending in a generally perpendicular direction between the second bottom surface and the second articular surface; wherein the first thickness is greater than the second thickness. - 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, 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. - 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 making a tibial implant for use in repairing or replacing a knee of a patient, comprising:
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(a) electronically evaluating at least a portion of the knee based on image data of the of the knee; and (b) specifying one or more parameters of the tibial implant based at least in part on the evaluation; wherein the specified parameters define at least in part a tibial implant having a first articular surface higher than a second articular surface relative to a proximal end of a tibia of the knee when the tibial implant is implanted on the proximal end of the tibia. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A method for making a tibial implant having at least one of a medial tibial insert and a lateral tibial insert that substantially matches a patient'"'"'s biological feature in one or more measurements, or as a predetermined percentage thereof, the method comprising:
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(a) preoperatively identifying a feature measurement of the patient'"'"'s joint; and (b) designing at least one of the medial tibial insert and the lateral tibial insert to include substantially the same feature measurement or a predetermined percentage of the feature measurement identified in step (a). - View Dependent Claims (50, 51, 52, 53)
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54. A method for implanting a knee implant in a patient'"'"'s knee, the method comprising the steps of:
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(a) preparing a proximal end of a tibia to receive an implant; and (b) inserting at least one tibial implant onto the prepared proximal end of the tibia such that a first articular surface of the at least one implant engages a first articular surface of a femur or femoral implant and a second articular surface of the at least one implant engages a second articular surface of the femur or femoral implant; wherein the first articular surface is higher than the second articular surface relative to an anatomical axis of the tibia. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86)
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87. A method for balancing or optimizing ligament tension during implantation of a knee implant in a patient, the method comprising the steps of:
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(a) assessing the patient'"'"'s medial joint gap distance and tension; (b) assessing the patient'"'"'s lateral joint gap distance and tension; and (c) selecting independent medial and lateral tibial inserts to provide proper gap distance and tension. - View Dependent Claims (88, 89, 90, 91, 92)
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93. 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.
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94. 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.
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Specification