Background: There are numerous surgical options for anterior talofibular ligament injury, but new biomechanical studies have demonstrated that existing surgical options cannot entirely restore the initial ATFL's biomechanical indensity. The goal of this study was to determine the biomechanical indensity of LARS talofibular ligament artificial ligament repair.
Methods: 12 fresh frozen human ankle specimens, average age 57±25.1 years (range 44~63 years), 12 cases of specimens sorted into two groups using the random number table approach, each group of 6 specimens, LARS group A, natural ligament group B, two groups of the identical biomechanical studies, evaluation of the highest failure load and stiffness in the two groups, respectively.
Results: The mean final failure load of the LARS repair group (378.6±25.7N) was significantly higher than that of the intact ATFL group (146.7±38.1N)(P=0.032). The mean stiffness of LARS group (27.6±4.7N/mm) was significantly higher than that of intact ATFL group (15.7±2.2N/mm)(P=0.022).LARS repair group failed because of suture pullout of the anchor at the fibula
(4/6) and the talus (2/6)
Conclusions: In fresh frozen cadaver models, the indensity and stiffness of ATFL restored by LARS ligaments are much higher than natural ligaments. Although the therapeutic benefit of LARS artificial ligaments has yet to be determined. Before this approach may be used in the therapeutic treatment of ankle ligament injuries, more study is needed.