It remains unclear to what extent the interosseous membrane (IOM) is affected through the whole range of motion (ROM) in posttraumatic deformities of the forearm. The purpose of this study is to describe the ligament- and bone-related factors involved in rotational deficit of the forearm. Through three-dimensional (3D) kinematic simulations on one cadaveric forearm, angular deformities of 5° in four directions (flexion, extension, valgus, varus) were produced at two locations of the radius and the ulna (proximal and distal third). The occurrence of bone collision in pronation and the linear length variation of six parts of the IOM through the whole ROM were compared between the 32 types of forearm deformities. Similar patterns could be observed among four groups: 12 types of deformity presented increased bone collision in pronation, 8 presented an improvement of bone collision with an increase of the mean linear lengthening of the IOM in neutral rotation, 6 had an increased linear lengthening of the IOM in supination with nearly unchanged bone collision in pronation and 6 types presented nearly unchanged bone collision in pronation with a shortening of the mean linear length of IOM in supination or neutral rotation. This kinematic analysis provides a better understanding of the ligament- and bone-related factors expected to cause rotational deficit in forearm deformity and may help to refine the surgical indications of patient-specific corrective osteotomy.

中文翻译：

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前臂畸形愈合：骨间膜三维长度变异与骨碰撞

目前尚不清楚骨间膜 (IOM) 在前臂创伤后畸形的整个运动范围 (ROM) 中受到何种程度的影响。本研究的目的是描述与前臂旋转缺陷有关的韧带和骨骼相关因素。通过对一具尸体前臂进行三维 (3D) 运动学模拟，在桡骨和尺骨（近端和远端三分之一）的两个位置产生了四个方向（屈曲、伸展、外翻、内翻）的 5° 角畸形。比较了 32 种前臂畸形在旋前时骨碰撞的发生率和整个 ROM 中 IOM 六个部分的线性长度变化。在四组中可以观察到相似的模式：12 种类型的畸形在旋前时骨碰撞增加，8 种在中性旋转时骨碰撞得到改善，IOM 的平均线性延长增加，6 种在旋后 IOM 线性延长增加，旋前骨碰撞几乎没有变化，6 种在旋前骨碰撞几乎没有变化在旋后或中性旋转时 IOM 的平均线性长度缩短。这种运动学分析可以更好地理解预期会导致前臂畸形旋转缺陷的韧带和骨骼相关因素，并可能有助于完善针对特定患者的矫正截骨术的手术适应症。6 种在旋后时 IOM 的线性延长增加，旋前时骨碰撞几乎没有变化，6 种类型在旋前时骨碰撞几乎没有变化，旋后或中性旋转时 IOM 的平均线性长度缩短。这种运动学分析可以更好地理解预期会导致前臂畸形旋转缺陷的韧带和骨骼相关因素，并可能有助于完善针对特定患者的矫正截骨术的手术适应症。6 种在旋后时 IOM 的线性延长增加，旋前时骨碰撞几乎没有变化，6 种类型在旋前时骨碰撞几乎没有变化，旋后或中性旋转时 IOM 的平均线性长度缩短。这种运动学分析可以更好地理解预期会导致前臂畸形旋转缺陷的韧带和骨骼相关因素，并可能有助于完善针对特定患者的矫正截骨术的手术适应症。