Smith + Nephew

Stephen Mirdo

Yangqiu Hu

Mohammed Rahman

A process according to certain embodiments includes generating a distal femur model including an intercondylar surface model, receiving information related to user-selected points on the intercondylar surface model, generating a datum line extending between the points, generating an axis line, and determining an AP axis based upon the axis line. Generating the axis line includes performing an axis line procedure including generating a plurality of planes along the datum line, generating a plurality of contours at intersections between the intercondylar surface model and the planes, generating saddle points at local extrema of the contours, and fitting the axis line to the saddle points. The process may further include generating an updated datum line based upon the axis line, and performing a subsequent iteration of the axis line procedure using the updated datum line.

Interactive anterior-posterior axis determination

An exemplary method includes receiving information relating to a long bone, and generating a bone model representative of the long bone. The long bone includes a shaft, and the bone model includes a shaft model representative of at least a portion of the shaft. The method includes identifying a target orientation for the bone model, and generating a cropped model including at least a portion of the shaft model. The method further includes generating cylinder parameters based at least in part upon the cropped model, registering the cylinder to the cropped model, and generating registration information related to the registering. The method further includes generating a correction angle based upon the registration information, and generating a corrected model based upon the correction angle. The method may further include generating an adjusted model based upon the corrected model, and generating a surgical device using the adjusted model.

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Memphis, TN, United States of America

Stephen Mirdo