Fig. (10) Four-years follow-up of male sustained a left Maestro TWA with age of 31 years due to post-traumatic wrist OA, previously published by the author at an one-year follow up [67: (A) Radiographs in both planes showing no signs of loosening of both Maestro components. (B) The ROM for extension-flexion is 50% of the contralateral uninjured wrist. (C) The "dart-throwing" motion is nearly completely preserved. Circumduction is demonstrated in an additionally attached video (supplementary material). The patient is very satisfied with his outcome, and stated that he would wish a revision Maestro TWA if the implant would loosen in the further course. Unfortunately, that is no longer possible such as described with the other patient in Figs. (7 A-E) [118, 119].