• Ainhoa Nekane Toro-Ibarguen, Rafael Navarro-Arribas, Juan Pretell-Mazzini, Alfonso Carlos Prada-Cañizares, and Fernando Jara-Sánchez.
• Orthopaedic Department, Hospital 12 de Octubre, Madrid, Spain.
• J Arthroplasty. 2016 Jul 1; 31 (7): 1539-43.

BackgroundSecondary patellar resurfacing (SPR) is a procedure that can be used in patients with persistent anterior knee pain (AKP) after a primary total knee arthroplasty. The aim of our study was to analyze the clinical and functional outcomes as well as the complications of this procedure and identify predictive factors for a favorable outcome.MethodsForty-six patients who underwent SPR for persistent AKP after primary total knee arthroplasty were retrospectively studied. The patient's mean age was 68 years (range, 36-86 years). The average follow-up time after SPR was 74 months (range, 24-197 months). Demographic data, Knee Society Score scale, range of motion, pain improvement (Visual Analogue Scale), overall satisfaction, and complications were recorded. The statistical analysis was performed using STATA tm/SE v10.ResultsThere was an improvement of the Knee Society scale (from 54 ± 11 to 64 ± 16 points; P < .05). However, in 59% of the cases, there was no pain improvement, and 65% of patients were not satisfied. Four patients showed complications, and in 2 cases, reoperation was necessary. We did not find any preoperative predictive factor for a favorable outcome after SPR.ConclusionDespite improvement of the Knee Society scale, many patients continue with AKP and are dissatisfied with this procedure; therefore, we do not recommend it in this clinical scenario.Copyright © 2016 Elsevier Inc. All rights reserved.

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