O2245 POSTERIOR STABILIZED TOTAL KNEE ARTHROPLASTY WITH AND WITHOUT RESURFACING OF THE PATELLA: A PROSPECTIVE EVALUATION

Abstract

Introduction: Whether to resurface or not resurface the patientñs patella at the time of TKA remains controversial. Our goal was to compare outcomes of 148 NexGen Legacy Posterior Stabilized TKAs in which the patella was resurfaced in 71 patients and left unresurfaced in 77 patients. Methods: Patients were followed prospectively and evaluated with Knee Society Scores, Hospital for Special Surgery scores, range of motion, SF12, and complications pre-operatively and at ≥ 2-year postoperatively. Results: There was no signiþcant difference in the Knee Society Function Subscore, range of motion, knee pain at rest, and SF12 scores at last follow-up. There was signiþcantly less knee pain while walking in patients who had their patella resurfaced, however there was no signiþcant difference in anterior knee pain. Hospital for Special Surgery and Knee Society Assessment Subscore were signiþcantly higher in the resurfaced group. One knee in the unresurfaced group was re-operated on with tibia tubercle osteotomy and medial reeþng for recurrent dislocation. This patient had a pre-operatively dislocated patellae. Another patient in the unresurfaced group had an undisplaced patellar fracture that was treated nonoperatively. This patient had extreme erosion of her patella pre-operatively. Conclusion: These results suggest that the innovative design of the NexGen Legacy Posterior Stabilized prosthesis may facilitate leaving the patella unresurfaced if indicated, however, pain scores may be superior with resurfacing.