Comparison of robot surgery modular and total knee arthroplasty kinematics.
The kinematics of seven knee specimens were measured from 0 to 120 degrees flexion using an up-and-down crouching machine. Motion was characterized by the positions of the centers of the lateral and medial femoral condyles in the anterior-posterior direction relative to a fixed tibia. A modular unicompartmental knee, trochlea flange, and patella resurfacing (multicompartmental knee [MCK] system) were implanted using a surgeon-interactive robot system that provided accurate surface matching. The MCK was tested, followed by standard cruciate retaining (CR) and posterior stabilized (PS) knees. The motion of the MCK was close to anatomic, especially on the medial side, in contrast to the CR and PS knees that showed abnormal motion features. Such a modular knee system, accurately inserted, has the potential for close to normal function in clinical application.
Department of Orthopaedic Surgery, New York University Hospital for Joint Diseases, New York, New York.
Gokce
G
Yildirim
Department of Orthopaedic Surgery, New York University Hospital for Joint Diseases, New York, New York.
Ivan
I
Fernandez-Madrid
Department of Orthopaedic Surgery, University of California, Irvine, California.
Ran
R
Schwarzkopf
Department of Orthopaedic Surgery, New York University Hospital for Joint Diseases, New York, New York.
Peter S
PS
Walker
Department of Orthopaedic Surgery, New York University Hospital for Joint Diseases, New York, New York.
Raj
R
Karia
D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001696:Biomechanical Phenomena; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D012371:Robotics