Patent ID: 8007448
Filing Date: 2011-08-30
Classification: A61B,A61F

Abstract:
1. A method of performing an arthroplasty of a stem-ball and socket joint with a surgical navigation system, the method comprising the steps of: digitizing landmarks to provide geometrical parameters of the joint and a limb depending therefrom, including digitizing aspects of a socket region and the stem of the limb; determining a range of motion parameter; placing a force sensor in the joint; collecting soft tissue tension force data from the force sensor while performing a range of motion analysis of the joint; determining a soft tissue tension parameter from the soft tissue tension force data; computing a functional goal based on landmark data, the range of motion parameter, the soft tissue tension parameter, and a database of potential implants; solving for a socket orientation to minimize impingement taking into account stability constraints based on an identified center of rotation of the socket; choosing an implant components combination and positioning to match the functional goal; solving for a socket position to minimize impingement taking into account stability constraints based on an identified stem position and the identified center of rotation of the socket; solving for a components combination and positioning to match the functional goal based on the socket position; solving for a components combination and orientation to match the functional goal based on the socket position and the identified stem position; choosing a final components combination and a final orientation of the components to match the functional goal; preparing the joint to receive the final implant components; and installing the final implant components into the joint.