Avaliação biomecânica de diferentes métodos de fixação tibial na reconstrução do ligamento anterolateral em ossos suínos

Abstract

ObjectivesTo evaluate different methods of tibial fixation in the reconstruction of the anterolateral ligament (ALL). In addition, this article aims to compare the effectiveness of these methods and their mechanisms of failure in swine knees. MethodsForty freshly frozen swine limbs were divided into four groups of ten specimens, according to the tibial fixation techniques used. In group A, the tibial fixation of the tendon graft was made through an anchor passing to the graft. In group B, the tibial fixation was performed through a metal interference screw in a single bone tunnel. In group C, the tibial fixation included an anchor associated with a suture in the tendon (without the presence of a wire crossing the tendon). In group D, two confluent bony tunnels were used, combined with an interference screw in one of the tunnels. ResultsThe lowest mean force (70.56N) was observed in group A and the highest (244.85N) in group B; the means of the other two groups ranged from 171.68N (group C) to 149.43N (Group D). Considering the margin of error (5%), a significant difference was observed between the groups (p < 0.001). ConclusionFixation with a single tunnel bone tunnel showed the highest tensile strength among the techniques evaluated.