Berthold L D, Peter A, Ishaque N, Mauermann F, Böhringer G, Klose K J
Department of Pediatric Radiology, Justus Liebig University, Giessen, Germany.
Skeletal Radiol. 2001 Oct;30(10):579-83. doi: 10.1007/s002560100416.
Rotational dislocation at the fracture site is a complication of long finger bone fractures of the metacarpals and phalanges. To evaluate such deformities, we performed CT of the articular surfaces of these bones to demonstrate the torsion angles.
We evaluated 10 pairs of cadaver hands. These were placed flat, with the bones of interest perpendicular to the gantry to acquire axial images. The torsion of the long bone axes was defined as the angle between a tangent positioned parallel to the proximal articular surface and a tangent parallel to the distal articular surface of individual bones.
The maximum difference between repeated measurements was 4 degrees. Intraobserver differences measured between right and left hands are less than 3 degrees.
Side differences in torsion angles exceeding 3 degrees are strongly suspicious of a malrotation after fracture. These measurements might help to plan derotational osteotomy and assess the results of therapy.
骨折部位的旋转脱位是掌骨和指骨长手指骨骨折的一种并发症。为评估此类畸形，我们对这些骨骼的关节面进行了CT扫描以显示扭转角度。
我们评估了10对尸体手。将其平放，使感兴趣的骨骼垂直于扫描架以获取轴向图像。长骨轴的扭转定义为与单个骨骼近端关节面平行的切线和与远端关节面平行的切线之间的角度。
重复测量之间的最大差异为4度。观察者双手之间测量的差异小于3度。
扭转角度的侧方差异超过3度强烈怀疑骨折后存在旋转不良。这些测量可能有助于计划旋转截骨术并评估治疗结果。
