J Knee Surg 2014; 27(02): 157-164
DOI: 10.1055/s-0033-1360654
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Comparison of Robot Surgery Modular and Total Knee Arthroplasty Kinematics

Gokce Yildirim
1   Department of Orthopaedic Surgery, New York University Hospital for Joint Diseases, New York, New York
,
Ivan Fernandez-Madrid
1   Department of Orthopaedic Surgery, New York University Hospital for Joint Diseases, New York, New York
,
Ran Schwarzkopf
2   Department of Orthopaedic Surgery, University of California, Irvine, California
,
Peter S. Walker
1   Department of Orthopaedic Surgery, New York University Hospital for Joint Diseases, New York, New York
,
Raj Karia
1   Department of Orthopaedic Surgery, New York University Hospital for Joint Diseases, New York, New York
› Author Affiliations
Further Information

Publication History

15 May 2013

06 September 2013

Publication Date:
13 November 2013 (online)

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Abstract

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.