Gait Analysis After Anterior Cruciate Ligament Surgery Comparing Primary Repair and Reconstruction Techniques

<b>Background</b>: ACL graft reconstruction is considered the gold standard for ACL injury treatment. Recently developed primary repair techniques such as InternalBrace ligament augmentation (Arthrex©) look like promising alternatives. The aim of our study is to compare functional results of two different surgical techniques using a gait analysis. <b>Methods</b>: A total of 42 patients who underwent surgical treatment for ACL rupture were included in this study. The first group was represented by patients who were surgically treated with ACL reconstruction. The second group included patients with acute ACL injury, who underwent primary repair with InternalBrace augmentation. Gait data were measured in the Human Motion Analysis Lab at our institution. The time interval for data collection was 6 weeks after surgery and 6 months after surgery. <b>Results</b>: There was no significant improvement in maximal and peak flexion for both group 1 and group 2 in the 6-week and 6-month intervals. Also, no significant improvement of maximal extension was found in group 1. In contrast, the study showed a reduction in maximal extension for group 2 in the 6-week and 6-month intervals. When comparing peak extension for the graft or InternalBrace techniques, no significant difference was found between both groups in the 6-week evaluation. However, results differed significantly in the 6-month evaluation. <b>Conclusions</b>: Considering the faster gain of extension, less invasiveness of the procedure, and shorter operating time, primary repair with InternalBrace augmentation seems to be a suitable option for treatment of proximal avulsions and Sherman I ACL ruptures.