Received 12 April 2008; accepted 14 September 2008. published online 05 December 2008.
Abstract
The outcomes of unicompartmental knee arthroplasties (UKAs) have demonstrated inconsistent long-term survival. We report the first clinical series of UKA using a semiactive robotic system for the implantation of an inlay unicondylar knee arthroplasty. Ten patients were selected for this study. Preoperative mechanical leg alignment values ranged from 0.3° varus to 9.8° varus. A haptic guidance system was used; a detailed description is given in the manuscript. The setup time for the robot was 41 minutes; intraoperative registration process, 7.5 minutes (6-13 minutes); skin incision, 8 cm; robot-assisted burring, 34.8 minutes (18-50 minutes); mean tourniquet time, 87.4 minutes (68-113 minutes); and overall operation time, 132 minutes (118-152 minutes). The planned and intraoperative tibiofemoral angle was within 1°. The postoperative long leg axis radiographs were within 1.6°. Haptic guidance in combination with a navigation module allows for precise planning and execution of both inlay components in UKA.
Orthopaedic Department, Hospital for Special Surgery, New York, New York
Reprint requests: Daniel O. Kendoff, MD, Orthopaedic Surgery, Computer Assisted Surgery Center, Hospital for Special Surgery, 532 East, 72nd Street, New York, NY 10021.
No benefits or funds were received in support of this study.
ABSTRACT