Chebolu Vela, Werner Frederick W
Department of Orthopedic Surgery, SUNY Upstate Medical University, Syracuse, New York.
J Wrist Surg. 2022 Jan 20;11(5):416-424. doi: 10.1055/s-0041-1742096. eCollection 2022 Oct.
Dart throw motions are frequently used during rehabilitation but the ideal orientation of a dart throw motion is unknown. The purpose of this study was to measure the axial force on the distal radius during different dart throw motions with the wrist and forearm in various positions. Our hypothesis was that there would be a significant difference on the axial force between various forearm positions and different dart throw orientations. Eight fresh frozen cadaver wrists were moved through 10 different orientations of a dart throw motion with the forearm in neutral, in pronation, and during a dynamic forearm rotation motion while the axial force was measured. Significantly smaller axial force occurred with the forearm in pronation than during the dynamic forearm motion. The shorter dart throw motions which were oriented equally toward the flexion/extension and radioulnar deviation axes had significantly smaller distal radius forces than nearly all of the other dart throw motions. Rehabilitation protocols incorporating a dart throw motion may be of benefit after injury or surgery. To minimize the axial force transmitted through a healing distal radius fracture, short dart throw motions, oriented at 45 degrees from the sagittal and coronal planes, with the forearm in pronation, might be preferable for range of motion activities during rehabilitation.
在康复过程中，经常会用到飞镖投掷动作，但飞镖投掷动作的理想方向尚不清楚。本研究的目的是测量在手腕和前臂处于不同位置时，不同飞镖投掷动作过程中桡骨远端的轴向力。我们的假设是，不同前臂位置和不同飞镖投掷方向之间的轴向力会有显著差异。八具新鲜冷冻尸体的手腕在前臂处于中立位、旋前位以及动态前臂旋转运动时，进行了10种不同方向的飞镖投掷动作，并测量了轴向力。前臂旋前时产生的轴向力明显小于动态前臂运动时。在前臂旋前时，同等程度地朝向屈伸轴和桡尺偏斜轴的较短飞镖投掷动作产生的桡骨远端力明显小于几乎所有其他飞镖投掷动作。纳入飞镖投掷动作的康复方案可能对损伤或手术后的恢复有益。为了尽量减少通过愈合中的桡骨远端骨折传递的轴向力，在康复过程中的活动范围训练中，前臂旋前，与矢状面和冠状面呈45度角的短飞镖投掷动作可能更为可取。
