Ligamentous Lisfranc injuries are debilitating injuries. This biomechanical study was to evaluate two methods of fixation utilizing interference screw fixation with InternalBrace augmentation in a cadaveric model. 9 paired foot specimens were separated into two groups based on fixation method. Diastasis and relative angular displacement between bones was measured under static and cyclic loading. The supplementary limb augmented InternalBrace fixation appears to be a reasonable treatment that provides superior biomechanical safety to the InternalBrace device alone.