System for determining the position of a knee prosthesis

摘要

The present application provides an apparatus and method for determining a position of a joint prosthesis using a computer assisted orthopedic surgery system in support of an arthroplasty surgery. The apparatus and method includes attaching a first locatable element to a first bone on one side of a joint, providing a sensor having a second locatable element and moving the sensor in proximity of the joint to locate a plurality of positions of the sensor relative to the first locatable element using a tracking device. The apparatus and method further includes selecting a generic model of a joint, determining the generic model in response to the plurality of positions located using the tracking device to generate a deformed model determining a position for a joint prosthesis on the deformed model, and outputting on a display the determined position upon the deformed model.

主权项

1. A method for determining a position of a joint prosthesis using a computer assisted orthopedic surgery system in support of an arthroplasty surgery of a joint of a patient comprising:
attaching a first locatable element to a first bone on one side of the joint; providing a sensor comprising a second locatable element; moving the sensor in proximity of the joint, wherein a plurality of positions on the first bone is located by locating a plurality of positions of the sensor relative to the first locatable element using a tracking device; selecting a generic model of a joint that is not specific to the patient; deforming, with the use of a computer, the generic model in response to the plurality of positions located on the first bone of the joint; determining an initial position of a joint prosthesis on the deformed model; determining a section plane in the deformed model corresponding to the initial position of the joint prosthesis; determining a contour between a surface of the deformed generic model and the section plane; and displaying the contour of the deformed generic model on a display.