Analyse 3D scannographique des tunnels d’allogreffe ligamentaire anatomique dans l’instabilité chronique de cheville. À propos de 33 cas

Abstract Introduction Although clinical results of anatomic reconstruction using allograft are reportedly good, studies on how accurately the tunnel has been made after surgery are very rare. The purpose of this study was to analyze the postoperative locations of the tunnels through 3-dimensional computed tomography (3D-CT) after anatomic ligament reconstruction and to evaluate its clinical results. Hypothesis We hypothesized that anatomic lateral ligament reconstruction could lead to excellent results in clinical outcomes by repositioning anterior talofibular ligament (ATFL) and calcaneofibular ligament (CFL) accurately. Materials and methods Thirty-three special forces of soldiers who were diagnosed as chronic ankle instability (CAI) were included. Visual analogue scale (VAS), American orthopaedic foot and ankle society (AOFAS) ankle-hindfoot functional scores, and Tegner activity scale were comparatively analyzed before the surgery and at final follow-up. The locations of the talar, fibular and calcaneal tunnels were evaluated with 3D-CT taken after the surgery. Talar tilt and anterior drawer displacement were measured on stress radiographs. Results The mean follow-up period was 26.8 ± 3.6 months. The VAS decreased from 6.9 ± 1.6 to 1.7 ± 1.3, AOFAS ankle-hindfoot functional score increased from 61.3 ± 14.8 to 88.7 ± 9.2, and Tegner activity scale improved from 5.3 ± 1.2 to 6.4 ± 1.3 ( p p Discussion Anatomic reconstruction of the lateral ligaments using allograft and the interference screw for CAI showed good results in postoperative stability and subjective clinical evaluation by repositioning the location of ATFL and CFL accurately on radiological determination. Level of evidence IV, Case-series.