Load Sensor Balancer Instruments
a technology of load sensor and balancer, which is applied in the field of orthopaedic procedures and apparatus, can solve the problems of reducing the load bearing capacity of the tensor, affecting the performance of the extensor mechanism, and affecting the stability of the tensor,
Inactive Publication Date: 2021-07-29
HOWMEDICA OSTEONICS CORP
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- Application Information
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Benefits of technology
The invention is a medical device used for replacing a damaged knee joint with an artificial one. The device includes a femoral paddle and a tibial paddle that can be moved along a distraction axis to create space between the two bones. The femoral paddle can be rotated to adjust its position. The device is designed to allow for accurate placement between the femur and the tibia without damaging the patella.
Problems solved by technology
However, a tensor with large paddles cannot be easily located within the tight joint space, especially during the initial insertion prior to distracting the knee joint.
However, long linking members have a tendency to induce cantilever loading and offset paddles cause torsion loading which reduces the load bearing capability of the tensor.
However, dislocating the patella in this manner can damage the soft tissue of the extensor mechanism.
Moreover, a complete and accurate assessment of the joint's balance through a flexion-extension range of motion cannot be assessed.
These sensors further increase the size of the tensor paddles and increase the difficulty of locating the paddles in a tight joint space.
Method used
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[0051]In describing preferred embodiments of the disclosure, reference will be made to directional nomenclature used in describing the human body. It is noted that this nomenclature is used only for convenience and that it is not intended to be limiting with respect to the scope of the invention.
[0052]As used herein, when referring to bones or other parts of the body, the term “anterior” means toward the front part or the face, and the term “posterior” means toward the back of the body. The term “medial” means toward the midline of the body, and the term “lateral” means away from the midline of the body. The term “superior” means closer to the heart, and the term “inferior” means more distant from the heart.
[0053]Reference will now be made in detail to the various embodiments of the present disclosure illustrated in the accompanying drawings. Wherever possible, the same or like reference numbers will be used throughout the drawings to refer to the same or like features. It should be...
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Abstract
Disclosed herein are apparatuses and methods for performing joint balancing procedures. The apparatus may have femoral paddle and a tibial paddle attached to a housing. The housing may include a distraction mechanism to vary the space between the femoral paddle and the tibial paddle. The tibial paddle may lie entirely within the femoral paddle in a closed position. A load sensor may be placed in the femoral paddle to measure ligament tension. The apparatus may be inserted into a knee joint and positioned to remain within the knee joint during flexion and extension of the knee without everting a patella.
Description
FIELD OF INVENTION[0001]The present disclosure relates to an apparatus and a method for performing orthopedic procedures, and in particular to an apparatus and a method for performing joint replacement procedures.BACKGROUND OF THE INVENTION[0002]Joint replacement procedures generally include replacing a subject's joint with prosthetic joint components. For example, a total knee arthroplasty (“TKA”) procedure includes replacement of the distal end of the femur and the proximal end of the tibia with a femoral prosthesis and a tibial prosthesis, respectively. Multiple bone resections on the distal femur and the proximal tibia are required prior to the implantations of these prostheses. Proper soft-tissue tension, joint alignment and balance are necessary for smooth and well-aligned joint movement.[0003]Various surgical tools such as tensors, balancer, spacers, alignment guides, load indicators, etc. are generally used to perform a TKA. After the initial bone resections of the tibia and...
Claims
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Patent Timeline
Login to View More IPC IPC(8): A61F2/46A61B17/02
CPCA61F2/461A61B2017/0268A61F2002/4666A61B17/025A61B17/0206A61B2090/065A61B2090/0807A61F2/38A61F2/4657A61F2/4684A61F2002/30985A61F2002/4661
Inventor COLLAZO, CARLOS E.
Owner HOWMEDICA OSTEONICS CORP