摘要
目的探索腕月骨周围进行性不稳定的运动力学变化。方法对１４具新鲜冷冻尸体腕关节，用计算机辅助测量了正常腕和各阶段月骨周围不稳定时腕动力肌腱在腕屈伸、尺桡偏时滑动幅度，根据肌腱滑动幅度和关节运动范围计算动力肌腱力臂。结果月骨周围进行性不稳定时屈腕肌腱力臂明显增大，屈指肌腱力臂减小；桡侧腕动力肌腱力臂以增大为主，尺侧肌腱力臂以减小为主。桡侧腕屈肌腱在腕屈伸或尺桡偏时均显著增大。结论腕运动力学变化对月骨周围不稳定的形成、运动力学变化、腕部塌陷起重要起动作用。
Objective To study the changes in dynamics of wrist motor tendons after perilunate instability of the wrist.Methods 14 cadaver upper extremities were used.Excursions of the principle wrist and finger motor tendons were measured during wrist flexion extension and radiolunar deviation was determined.Data were collected in the intact wrist, then in the wrist with stage Ⅰ, Ⅱ and Ⅲ perilunate instability.The average moment arms of the tendons during wrist motion were calculated.Results The moment arms of the wrist flexors increased and those of the finger flexors decreased after instability. Increase in the moment arms dominated changes of radial side wrist motors, while decrease in the moment arms dominated ulnar wrist motors. Moment arms of the flexor carpi radialis tendon showed a consistent increase during wrist motion. Conclusion The changes in wrist dynamics play an important role in clinical manifestations of perilunate instability. The significance of kinetic information on principle of treatment of the instability is discussed.
出处
《中华外科杂志》
CAS
CSCD
北大核心
1998年第1期46-49,共4页
Chinese Journal of Surgery
关键词
腕关节
月骨
PPI
运动力学
Wrist joint Semilunar bone Wounds and injuries
