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US 2018/0008433 A1Published application
Method of estimating soft tissue balance for knee arthroplasty
AssigneeZimmer, Inc.
InventorJia LI
Life of this patent
Estimating the term…
Abstract
A method is provided for evaluating the tension or laxity of the soft tissue surrounding a patient's knee joint. Based on this evaluation, a surgeon may determine a desired resection depth for a knee arthroplasty procedure that will achieve an appropriate spacing between adjacent, articulating components of the knee joint.
Claims1
A method of performing an arthroplasty procedure on a patient's knee joint, the knee joint including a femur and a tibia, the method comprising:
- obtaining preoperatively a three-dimensional model of the patient's knee joint, the three-dimensional model based on at least one of a MRI, CT and X-ray image of the patient's knee joint;
- determining preoperatively an initial resection depth for a femoral prosthesis;
- capturing the rotation of the patient's femur relative to the tibia in response to a directed force applied to the patient's knee joint;
- adjusting the initial resection depth based on the captured rotation to determine an actual resection depth;
- and
- resecting the patient's femur according to the actual resection depth.
3 more elements
Dependencies are inferred from the claim text.