Method of computer-assisted ligament balancing and component placement in total knee arthroplasty
First Claim
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1. A system for use by a surgeon in the course of computer-assisted total arthroplasty on a patient'"'"'s knee. The system comprises:
- at least one first fiducial associated with a femur or a femoral prosthetic component;
at least one second fiducial associated with a tibia or a tibial prosthetic component;
a tracking functionality capable of tracking a position and orientation of the at least one first fiducial and the at least one second fiducial;
a computer, wherein the computer is adapted to receive and store information from the tracking functionality on the position and orientation of the at least one first fiducial and the at least one second fiducial, adapted to acquire information during kinematic testing relating to the position and orientation of the at least one first fiducial and the at least one second fiducial;
adapted to store in memory a logic matrix for assessing kinematics of the knee by comparing to the logic matrix the information acquired during the kinematic testing of the knee, and adapted to provide output in the form of recommendations on soft tissue balancing based on comparison to the logic matrix of the information obtained during the kinematic testing.
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Abstract
Systems, methods and processes for computer-assisted soft tissue balancing, including ligament balancing, determining surgical cuts, and positioning or placement of the components of the prosthetic knee during TKR. The improved methods, systems and processes resolve several problems related to the prosthetic knee component positioning and soft-tissue balancing during computer-assisted TKR. The improved methods, systems and processes are flexible and versatile, provide reliable recommendations to the surgeon, and improve restoration of the knee function and patient recovery.
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Citations
20 Claims
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1. A system for use by a surgeon in the course of computer-assisted total arthroplasty on a patient'"'"'s knee. The system comprises:
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at least one first fiducial associated with a femur or a femoral prosthetic component;
at least one second fiducial associated with a tibia or a tibial prosthetic component;
a tracking functionality capable of tracking a position and orientation of the at least one first fiducial and the at least one second fiducial;
a computer, wherein the computer is adapted to receive and store information from the tracking functionality on the position and orientation of the at least one first fiducial and the at least one second fiducial, adapted to acquire information during kinematic testing relating to the position and orientation of the at least one first fiducial and the at least one second fiducial;
adapted to store in memory a logic matrix for assessing kinematics of the knee by comparing to the logic matrix the information acquired during the kinematic testing of the knee, and adapted to provide output in the form of recommendations on soft tissue balancing based on comparison to the logic matrix of the information obtained during the kinematic testing. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of computer-assisted total arthroplasty on a patient'"'"'s knee, comprising the steps of:
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registering with a computer at least one first fiducial associated with a femur or a femoral prosthetic component; and
at least one second fiducial associated with a tibia or a tibial prosthetic component;
tracking position and orientation of the at least one first fiducial and the at least one second fiducial with a tracking functionality;
using the computer adapted to receive signals and store information from the tracking functionality on the position and orientation of the at least one first fiducial; and
the at least one second fiducial;
assessing performance of the knee using kinematic testing of the knee;
using the computer to compare information from the tracking functionality obtained during the kinematic testing on the position and orientation of the at least one first fiducial; and
the at least one second fiducial, to a logic matrix stored in the memory of the computer, andusing the computer to provide recommendations on soft tissue balancing of the knee based on the comparison with the logic matrix. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification