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Tibiofibular Relationships of the Normal Syndesmosis on Axial Computed Tomography in the Turkish Population
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Objective: Computed tomography (CT) is superior to plain radiography for evaluating ankle syndesmosis, but anatomical variations can affect the measurements. This study aimed to assess the radiologic parameters of the incisura fibularis and the factors that could affect these parameters.
Materials and Methods: Lower-extremity CT angiography images were used to evaluate the morphology of the incisura fibularis, anterior and posterior tibiofibular distance, longitudinal and transverse length of the distal fibula, length and depth of the incisura fibularis notch, tibiofibular clear space, tibiofibular overlap, and fibular rotation. Each measured parameter was compared based on sex and body side. Also, the effect of age, height, weight, and body mass index (BMI) on parameters was evaluated.
Results: A total of 123 patients (83 men and 40 women) were included, and 246 ankles were measured. The CT measurements demonstrated excellent intraobserver and interobserver reliability. No statistically significant sex or side differences were found in tibiofibular overlap (TFO) and tibiofibular clear space, the most-used parameters in radiographs. Age, weight, and BMI were found to be correlated with TFO.
Conclusions: The present study provides CT measurements of the normal tibiofibular syndesmosis in the Turkish population. Also, the correlations of the parameters with age, height, weight, and BMI are presented. Therefore, TFO and tibiofibular clear space of the uninjured side can be used to plan the treatment of ankle injuries.
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