Kaufmann Robert A, Kozin Scott H, Barnes Arlian, Kalluri Prakash
Department of Orthopaedic Surgery, Temple University School of Mechanical Engineering, Philadelphia, PA, USA.
J Hand Surg Am. 2002 Jan;27(1):93-7. doi: 10.1053/jhsu.2002.30072.
The changes in strain distribution along the radius and ulna with loading and interosseous membrane (IOM) section were analyzed in this biomechanical study. Four cadaveric upper extremities were dissected and strain gauges applied. The forearm was loaded at the distal radius with a carpal implant after being positioned upright in neutral forearm rotation. Strain measurements were recorded before and after transection of the IOM. Before IOM transection, increased compressive strain was measured on the ulnar border of the ulna, while increased tensile strain was recorded on the dorsal aspect of the ulna, the dorsal aspect of the radius, and the lateral border of the radius when compared with the unloaded forearm. This suggests bowing of the radius and ulna with the convex side dorsally and bowing of the radius with the convex side radially. After IOM transection, increased tensile strain on the lateral border of the radius and the ulnar border of the ulna was measured when compared with the loaded forearm with an intact IOM. No change in strain patterns was measured by the strain gauges located on the dorsal aspect of the radius or ulna after IOM transection. The increased tensile strain during constant load application suggests increased bending moments acting on the radius and ulna after IOM transection.
在这项生物力学研究中，分析了加载和切断骨间膜（IOM）时桡骨和尺骨沿半径方向的应变分布变化。解剖了四个尸体上肢并应用应变片。在前臂处于中立旋转位直立放置后，用腕部植入物在桡骨远端加载。在切断IOM之前和之后记录应变测量值。在切断IOM之前，与未加载的前臂相比，在尺骨的尺侧缘测量到压缩应变增加，而在尺骨的背侧、桡骨的背侧和桡骨的外侧缘记录到拉伸应变增加。这表明桡骨和尺骨向背侧凸出弯曲，桡骨向外侧凸出弯曲。切断IOM后，与IOM完整的加载前臂相比，在桡骨外侧缘和尺骨尺侧缘测量到拉伸应变增加。切断IOM后，位于桡骨或尺骨背侧的应变片未测量到应变模式的变化。在持续加载过程中拉伸应变增加表明切断IOM后作用于桡骨和尺骨的弯矩增加。
