Stressradiographs for diagnosing PCL-ruptures are prone to errors. To evaluate the impact of limb rotation and flexion on translation meassurements, anatomic knee specimens were scanned with CT. Datasets were reconstruted as digital radiographs using 3D visualisation software. In our study the deviation from 90 degree flexion provided a smaller source of error than malrotation. Therefore, it should be avoided to consult radiographs with a rotational error greater than 10 degrees. In addition, identification of tibial landmarks for measurement of posterior tibial translation showed to be another source of error.
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Stressradiographs for diagnosing PCL-ruptures are prone to errors. To evaluate the impact of limb rotation and flexion on translation meassurements, anatomic knee specimens were scanned with CT. Datasets were reconstruted as digital radiographs using 3D visualisation software. In our study the deviation from 90 degree flexion provided a smaller source of error than malrotation. Therefore, it should be avoided to consult radiographs with a rotational error greater than 10 degrees. In addition, id...
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