DEVICES AND METHODS FOR KNEE ARTHROPLASTY
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Abstract
The present invention provides, in certain embodiments, a device for positioning and orienting the femoral cutting block. The present invention also provides a device for setting rotation of sagittal resection for unicompartmental knee arthroplasty. The present invention further provides methods for setting the rotation of the tibial implant by kinematic measurements.
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Citations
27 Claims
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1-10. -10. (canceled)
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11. A system for setting tibial implant rotation, comprising:
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at least one orientation device configured to be coupled with one or both of a femur and a tibia; a plurality of tibial trial components configured to be placed between the tibia and the femur; and a processor configured to perform one or more of the following functions; (i) gathering measurements from one or more inertial sensors of the orientation device(s); (ii) performing calculations to convert the measurements from the inertial sensors to tibio-femoral kinematic information; (iii) comparing the tibio-femoral kinematic information to target values of tibio-femoral kinematics; and (iv) transmitting user output corresponding to one or both of the tibio-femoral kinematic information and the target vales.
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12. A method for setting tibial implant rotation, comprising:
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(a) coupling at least one inertial sensor with at least one of a tibia and a femur of a leg of a patient; (b) positioning an implant on a resected surface of the tibia of the patient; (c) moving the leg to position the tibia in a plurality of positions differing in flexion, axial rotation, and/or varus-valgus relative to the femur; and (d) comparing values based on output of the sensors indicative of tibio-femoral kinematics with tibio-femoral kinematic target values for one or more of flexion, axial rotation, and/or varus-valgus. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method comprising:
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completing tibial resection; coupling at least one inertial sensor with at least one of a tibia and a femur of a leg of a patient; and providing an inertial measurement with the knee in full extension, 90 degrees flexion or any other angle to which the knee can be flexed. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification