Dynamic knee balancer
First Claim
1. A device for enhancing a surgical procedure on a knee, the device comprising:
- a tibial member having a pair of complementary depressions, said tibial member being engageable with a surface of the proximal tibia;
at least one stationary femoral member for removably attaching to a distal femur; and
at least one adjustable femoral member having a first surface disposed to contact the tibial member when the knee is in extension and having a posterior condylar member including a medial femoral posterior condylar portion and a lateral femoral posterior condylar portion, said posterior condylar member being disposed at a substantially right angle relative to the first surface so that the medial and lateral femoral posterior condylar portions slidingly contact the complementary depressions in the tibial member when the knee is in flexion, said adjustable femoral member being movably engaged with the stationary femoral member to adjust tension in at least one ligament of the knee, the adjustable femoral member including an adjustment member that moves the adjustable femoral member in an anterior-posterior direction relative to the stationary femoral member for facilitating completion of the surgical procedure to enhance range of motion, stability or patella tracking of the knee;
wherein the adjustable femoral member is movably engageable with said tibial member engaged with a proximal tibia to allow the knee to be moved through a range of motion from a fixed position to an extended position without removing the femoral and tibial members.
1 Assignment
0 Petitions
Accused Products
Abstract
Dynamic knee balancing devices, systems and methods provide for enhanced total knee arthroplasty (“TKA”) procedures. Devices generally include a stationary femoral member for removably attaching to a distal femur and an adjustable femoral member coupled with the stationary member for adjusting ligament tension of the knee. The adjustable femoral member includes at least one positioning feature for providing positional and/or orientation information for facilitating the TKA procedure. Additionally, the adjustable femoral member is movably couplable with a tibial member engaged with the proximal tibia to allow movement of the knee through a range of motion without removing the device from the joint space. When the adjustable femoral member is adjusted, the positional feature(s) move relative to the distal femur to provide positional information.
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Citations
40 Claims
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1. A device for enhancing a surgical procedure on a knee, the device comprising:
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a tibial member having a pair of complementary depressions, said tibial member being engageable with a surface of the proximal tibia; at least one stationary femoral member for removably attaching to a distal femur; and at least one adjustable femoral member having a first surface disposed to contact the tibial member when the knee is in extension and having a posterior condylar member including a medial femoral posterior condylar portion and a lateral femoral posterior condylar portion, said posterior condylar member being disposed at a substantially right angle relative to the first surface so that the medial and lateral femoral posterior condylar portions slidingly contact the complementary depressions in the tibial member when the knee is in flexion, said adjustable femoral member being movably engaged with the stationary femoral member to adjust tension in at least one ligament of the knee, the adjustable femoral member including an adjustment member that moves the adjustable femoral member in an anterior-posterior direction relative to the stationary femoral member for facilitating completion of the surgical procedure to enhance range of motion, stability or patella tracking of the knee;
wherein the adjustable femoral member is movably engageable with said tibial member engaged with a proximal tibia to allow the knee to be moved through a range of motion from a fixed position to an extended position without removing the femoral and tibial members. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification