Mid-term functional, clinical, and radiological outcomes with factors affecting revision of mobile-bearing medial unicompartmental knee arthroplasty Erdal Uzun a, ⁎, Abdulhamit Misir b , Turan Bilge Kizkapan c , Mustafa Ozcamdalli d , Ali Eray Gunay e , Kazim Husrevoglu e a Department of Orthopaedics and Traumatology, Erciyes University, Faculty of Medicine, Kayseri, Turkey b Department of Orthopaedics and Traumatology, Health Sciences University Gaziosmanpasa Taksim Training and Research Hospital, Istanbul, Turkey c Department of Orthopaedics and Traumatology, Bursa Cekirge State Hospital, Bursa, Turkey d Department of Orthopaedics and Traumatology, Ahi Evran University Faculty of Medicine, Kirsehir, Turkey e Department of Orthopaedics and Traumatology, Health Sciences University Kayseri City Hospital, Kayseri, Turkey article info abstract Article history: Received 11 July 2019 Received in revised form 5 November 2019 Accepted 25 November 2019 Available online xxxx Background: To evaluate and compare the clinical and radiological outcomes of patients sub- jected to medial unicompartmental knee arthroplasty (UKA). Methods: The study included 146 knees of 115 consecutive medial UKAs patients with a min- imum five-year follow-up. Pre- and postoperative functional and clinical outcomes were mea- sured using the Visual Analog Scale (VAS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Oxford Knee Score (OKS), American Knee Society Score (AKSS-O), knee range of motion (ROM), and Short-Form Health Survey (SF-36). The Kellgren–Lawrence osteoarthritis (OA) grading system was used for the evaluation of the OA status. The joint line convergence angle (JLCA) of the operated and contralateral knee, the tibiofemoral coronal angle (TFCA), and the tibial slope angle were used in the radiological eval- uation. Results: The mean age of patients was 58.8 ± 7.0 years. The mean follow-up period was 7.41 ± 1.54 years. Good to excellent functional outcomes were obtained according to VAS, WOMAC, OKS, AKSS-O, and SF-36 scores. Insert dislocation was the main reason for revision surgery (nine patients, 90%). Preoperative body mass index (BMI), postoperative BMI, Ameri- can Society of Anesthesiologists (ASA) Score, postoperative knee flexion contracture, mean in- crease in postoperative medial joint space (PMJS) height, and OA progression were found to affect the revision status. Conclusions: Good to excellent functional, clinical, and radiological outcomes were obtained with medial UKA at a minimum follow-up of five years. Differences in preoperative and post- operative radiological parameters except an increase in PMJS height had no impact on revision status. © 2019 Elsevier B.V. All rights reserved. Keywords: Unicompartmental knee arthroplasty Revision Medial Outcomes Oxford knee 1. Introduction Unicompartmental knee arthroplasty (UKA) is a widely used option in the treatment of isolated unicompartmental osteoar- thritis (OA) [1–3]. Over the past two decades, indications for UKA have been expanded due to the advantages of reduced invasive- The Knee xxx (xxxx) xxx ⁎ Corresponding author at: Department of Orthopaedics and Traumatology, Erciyes University Faculty of Medicine, Kosk mah, Dede Efendi sk, PK 38030 Melikgazi, Kayseri, Turkey. E-mail address: erdaluzun@erciyes.edu.tr. (E. Uzun). THEKNE-02950; No of Pages 8 https://doi.org/10.1016/j.knee.2019.11.012 0968-0160/© 2019 Elsevier B.V. All rights reserved. Contents lists available at ScienceDirect The Knee Please cite this article as: E. Uzun, A. Misir, T.B. Kizkapan, et al., Mid-term functional, clinical, and radiological outcomes with factors affecting revision of mobile-bearing..., The Knee, https://doi.org/10.1016/j.knee.2019.11.012