CAS system for condyle measurement

摘要

A computer assisted surgery system for conducting orthopedic surgery on a knee joint includes a condyle digitizer having a posterior condyle abutment surface defining a first plane and a distal condyle abutment surface defining a second plane perpendicular to the first plane, and a trackable member which is locatable and trackable in three dimensional space by the computer assisted surgery system to define at least orientation of the condyle digitizer in real time. A computer determines a most remote reference point of the femur of the knee joint lying within at least one of the first and second planes when the condyle digitizer is abutted against condyles of the femur such that the posterior condyle abutment surface abuts a posterior side of the condyles and the distal condyle abutment surface abuts a distal side of the condyles.

主权项

1. A computer assisted surgery system for conducting orthopedic surgery on a knee joint, the knee joint including a femur defining a longitudinal mechanical axis and having condyles on the distal end thereof, the system comprising:
a condyle digitizer including a posterior condyle abutment surface defining a first plane and a distal condyle abutment surface intersecting perpendicularly the posterior condyle abutment surface and defining a second plane perpendicular to said first plane, and at least one trackable member which is locatable and trackable in three dimensional space by the computer assisted surgery system, thereby defining at least an orientation of the condyle digitizer in real time; and a computer in communication with the condyle digitizer, the computer being operable to determine a most remote reference point of the femur lying within at least one of said first and second planes when said condyle digitizer is abutted directly against the condyles of the femur such that the posterior condyle abutment surface directly abuts a posterior side of the condyles and the distal condyle abutment surface directly abuts a distal side of the condyles.