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Abstract This study aims to evaluate the reliability of plain X-ray radiographs in the immediate post-operative assessment ofsyndesmosis disruption in ankle fractures. Also, the impact of the missed mal-reduction on the functional outcome and rehabilitation of the patients. Syndesmosis disruption occurs in 10% of ankle fractures. Being rotationally unstable, they are associated with an unacceptably high rate of mal-reduction after ORIF of ankle fractures with syndesmosis injury. The majority of malreductions are due to rotational deformities of the fibula within the incisura. Plain X- rays, both intra and early post-operatively, have been long used as a method of assessment for the quality of reduction. However, recent studies have aroused the limitation of X-rays in detecting many rotational deformities, syndesmotic subluxation, and diastasis, which affected patients’ outcomes and later-on their functional score and rehabilitation. Prospectively, 38 patients with unimalleolar, bimalleolar, or tri-malleolar ankle fracture associated with syndesmosis injury were diagnosed pre-operatively or intra-operatively in Kasr Al-Ainy hospital. In the period from March 2021 to June2021.Open reduction and internal fixation was done. We divided them into three groups based on their post-operative CT imaging studies: |