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Objective  To evaluate and compare the clinical and radiographic outcomes of proximal fibular osteotomy (PFO) in treating medial knee osteoarthritis (KOA) patients with upper fibular curvature and non‐curvature.    Methods  A retrospective cohort study was performed. From January 2016 to January 2017, a total of 51 patients (nine males and 42 females) at a mean age of 63.7 years (range 48–79 years) with medial KOA who underwent PFO procedure at the Third Hospital of Hebei Medical University were included in the study. The patients were divided into the two groups, namely curvature group (28 patients, six males and 22 females, aged 62.6 ± 7.7 years) and non‐curvature group (23 patients, three males and 20 females, aged 64.5 ± 7.6 years). Perioperative parameters and Kellgren‐Lawrence classification were recorded and analyzed in the two groups, respectively. All patients were followed up at 1, 3, 6, and 12 months at the first year of post‐operation, and then every 6 months from the second year of post‐operation. A telephone survey with standard questionnaire survey, including Visual Analog Scale (VAS) score and Hospital for Special Surgery (HSS) scoring system, was used to evaluate postoperative clinical outcomes. Radiological results were assessed using the femorotibial angle (FTA), hip‐knee‐ankle angle (HKA), and settlement value of medial tibial platform (MTP) in the two groups.    Results  The average follow‐up periods of the curvature group and the non‐curvature group were 34.8 ± 6.1 and 33.9 ± 5.4 months, respectively. There were no significant differences between the two groups of demographic data in terms of number of patients, age, body mass index (BMI), gender, KOA side, and Kellgren‐Lawrence classification ( P  > 0.05). The VAS scores of the curvature group and non‐curvature group were (3.53 ± 1.62  vs  3.68 ± 1.43 at 1 month, 3.46 ± 0.79  vs  3.57 ± 0.66 at 3 months, and 2.43 ± 0.88  vs  2.83 ± 0.94 at 6 months, both  P  > 0.05), while significant differences were found from 12 months post‐operation (1.54 ± 0.72  vs  2.03 ± 0.85 at 12 months, and 1.04 ± 0.69  vs  1.74 ± 0.75 at 24 months, both  P <  0.05). The HSS scores of the curvature group and non‐curvature group were (79.67 ± 5.14  vs  78.25 ± 6.37 at 1 month, 84.65 ± 3.76  vs  83.18 ± 3.64 at 3 months, and 86.27 ± 3.13  vs  85.49 ± 3.25 at 6 months, both  P  > 0.05), while significant differences were found from 12 months post‐operation (90.64 ± 4.32  vs  87.71 ± 5.63 at 12 months, and 92.93 ± 2.07  vs  90.06 ± 2.08 at 24 months, both  P <  0.05). In addition, the FTA and settlement value of the curvature group were lower than the non‐curvature group (177.18 ± 1.52  vs  178.35 ± 1.86, and 5.29 ± 1.74  vs  6.49 ± 2.09, both  P <  0.05) while the HKA were higher than the non‐curvature group (175.32 ± 2.34  vs  173.83 ± 2.64,  P <  0.05) at the final follow‐up.    Conclusions  Medial KOA patients with upper fibular curvature is an optimal surgical indication for PFO surgery, with the advantages of pain relief, better functional recovery, and alignment correction.

orthopaedic surgery

Comparison of Clinical and Radiological Outcomes Between Upper Fibular Curvature and Non‐Curvature with Medial Knee Osteoarthritis Following Proximal Fibular Osteotomy: A Retrospective Cohort Study with Minimum 2‐Year Follow‐up