“…It has previously been shown that ankle arthroplasty does not increase ROM of the ankle but rather preserves motion presented preoperatively. 3,5,29,30 In this study, the amount of ROM was not altered significantly by ankle arthroplasty, but it was preserved or in some patients slightly improved. The overall sagittal ROM of the ankle has been shown to consist of both TT and talonavicular motion after TAR.…”