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US 9,872,689 B1Granted
Knee arthroplasty preparation devices and methods
OwnerLucas Anissianinventor
Life of this patent
Estimating the term…
Abstract
Knee arthroplasty preparation devices include a tibial cutting block adapted for attachment to a tibia, a femoral cutting block adapted for attachment to a femur and a block positioning guide engaging the tibial cutting block and the femoral cutting block. Knee arthroplasty preparation methods are also disclosed.
Claims17
An extramedullary knee arthroplasty preparation device for precise cutting of a femur and a tibia preparatory to a knee arthroplasty procedure, comprising:
- a longitudinal adjusting rod for extension along and parallel to a mechanical axis of the tibia;
- a tibial cutting block adapted for attachment to a tibia, the tibial cutting block positional across the longitudinal adjusting rod;
- a femoral cutting block adapted for attachment to a femur;
- a block positioning guide configured to engage the tibial cutting block and the femoral cutting block, the block positioning guide including a pair of elongated, parallel, spaced-apart longitudinal guide frames and a pair of transverse guide frames connecting the longitudinal guide frames and the pair of longitudinal guide frames pivotal with respect to the pair of transverse guide frames;
- and
- a valgus angle of the femoral cutting block relative to the mechanical axis is selectively adjustable by pivoting the longitudinal guide frames relative to the transverse guide frames of the block positioning guide.
3 more elements
A knee arthroplasty preparation method, comprising:
- providing an extramedullary knee arthroplasty preparation device including:
- a longitudinal adjusting rod for extension along and parallel to a mechanical axis of the tibia;
- a tibial cutting block adapted for attachment to a tibia, the tibial cutting block positional across the longitudinal adjusting rod;
- a femoral cutting block adapted for attachment to a femur;
- a block positioning guide configured to engage the tibial cutting block and the femoral cutting block, the block positioning guide including a pair of elongated, parallel, spaced-apart longitudinal guide frames and a pair of transverse guide frames connecting the longitudinal guide frames and the pair of longitudinal guide frames pivotal with respect to the pair of transverse guide frames;
- and
- a valgus angle of the femoral cutting block relative to the mechanical axis is selectively adjustable by pivoting the longitudinal guide frames relative to the transverse guide frames of the block positioning guide;
- aligning a femur and a tibia in an extended position;
- placing the tibial cutting block on the tibia, the tibial cutting block having a first cutting plane surface;
- aligning and adjusting the tibial cutting block;
- fastening the tibial cutting block to the tibia;
- placing the femoral cutting block on the femur, the femoral cutting block having a second cutting plane surface;
- placing the block positioning guide in engagement with the femoral cutting block and the tibial cutting block;
- aligning the femoral cutting block with the second cutting plane surface at an optimal angle to the first cutting plane surface of the tibial cutting block by adjusting the block positioning guide;
- fastening the femoral cutting block to the femur;
- cutting the tibia along the first cutting plane surface;
- and
- cutting the femur along the second cutting plane surface.
15 more elements
A knee arthroplasty preparation method, comprising:
- providing an extramedullary knee arthroplasty preparation device including:
- a longitudinal adjusting rod for extension along and parallel to a mechanical axis of the tibia;
- a tibial cutting block adapted for attachment to a tibia, the tibial cutting block positional across the longitudinal adjusting rod;
- a femoral cutting block adapted for attachment to a femur;
- a block positioning guide configured to engage the tibial cutting block and the femoral cutting block, the block positioning guide including a pair of elongated, parallel, spaced-apart longitudinal guide frames and a pair of transverse guide frames connecting the longitudinal guide frames and the pair of longitudinal guide frames pivotal with respect to the pair of transverse guide frames;
- and
- a valgus angle of the femoral cutting block relative to the mechanical axis is selectively adjustable by pivoting the longitudinal guide frames relative to the transverse guide frames of the block positioning guide;
- aligning a femur and a tibia in an extended position;
- aligning the longitudinal adjusting rod along the mechanical axis of the tibia;
- placing the tibial cutting block on the tibia and across the longitudinal adjusting rod, the tibial cutting block having a first cutting plane surface;
- aligning and adjusting the tibial cutting block using the longitudinal adjusting rod;
- fastening the tibial cutting block to the tibia;
- removing the longitudinal adjusting rod from beneath the tibial cutting block;
- placing the femoral cutting block on the femur, the femoral cutting block having a second cutting plane surface;
- placing the block positioning guide in engagement with the femoral cutting block and the tibial cutting block;
- aligning the femoral cutting block with the second cutting plane surface at an optimal angle to the first cutting plane surface of the tibial cutting block by adjusting the block positioning guide;
- fastening the femoral cutting block to the femur;
- disengaging the block positioning guide from the tibial cutting block and the femoral cutting block;
- cutting the tibia along the first cutting plane surface;
- and
- cutting the femur along the second cutting plane surface.
18 more elements
Dependencies are inferred from the claim text.