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VOLUME 16 , ISSUE 2 ( May-August, 2021 ) > List of Articles

Original Article

Correction of Genu Recurvatum Deformity Using a Hexapod Frame: A Case Series and Review of the Literature

Liam Johnson, James McCammon, Anthony Cooper

Keywords : Genu recurvatum, Ilizarov, Osteotomy, Taylor spatial frame

Citation Information : Johnson L, McCammon J, Cooper A. Correction of Genu Recurvatum Deformity Using a Hexapod Frame: A Case Series and Review of the Literature. 2021; 16 (2):116-119.

DOI: 10.5005/jp-journals-10080-1528

License: CC BY-NC-SA 4.0

Published Online: 27-10-2021

Copyright Statement:  Copyright © 2021; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim and objective: Genu recurvatum is a rare deformity for which minimal literature exists. Non-operative management typically gives unsatisfactory results. This study aims to evaluate the treatment of genu recurvatum with a hexapod frame. Materials and methods: A single-center retrospective chart review of genu recurvatum cases treated with a hexapod fixator application was performed. Radiographic parameters included the following: leg length discrepancy (LLD), angle of recurvatum, angle of tilt of the tibial plateau, patellar height and anatomic proximal posterior tibial angle (aPPTA). Radiographic and functional results were evaluated. Results: A total of five patients with six limbs corrected with a hexapod frame were found. Aetiology included post-traumatic (2), post-infectious (1) and idiopathic (3). The mean age at application was 13.36 (5.5–18.0) years. The total mean time in the fixator was 225 (160–412) days. The LLD decreased from a mean of 35.6 mm (0.7–50) preoperatively to a mean of 14.8 (1.0–39.3) postoperatively. The average patellar height remained similar 0.97 (0.69–1.2)–0.97 (0.51–1.6). The angle of the tilt of the tibial plateau improved from a preoperative mean of 66° (58.5–73.5°)–92.5° (80–98.5°). The angle of recurvatum improved from a preoperative mean of 26.4° (18.5–31°)–5.0° (0–9°). The aPTTA improved from (102–118°)–85.5° (77–96°). Conclusion: Osteotomy distal to the tibial tuberosity and deformity correction using a hexapod frame allows for multiplanar correction. Throughout treatment, soft tissue management with physical therapy remained key to prevent knee contracture. Clinical significance: A hexapod frame is a safe and accurate technique that allows correction of genu recurvatum along with concomitant deformities with low risk of complications.


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