摘要
目的研究三角纤维软骨复合体(triangularfibrocartilagecomplex,TFCC)水平部分结构切除的几种术式对尺骨载荷功能的影响,从生物力学的角度分析手术的疗效及机制。方法采用8侧青年新鲜尸体上肢标本,固定在加载架上。用MTS试验机控制加载,采用压敏片测量压力。分析TFCC水平部分不同程度切除后对尺侧腕传递载荷功能的影响。结果TFCC水平部分1/3切除后,腕部传递至尺骨的载荷稍减小,与完整标本相比,差异无显著性意义(t=2.1P>0.05);2/3切除或全部切除后腕部传递至尺骨的载荷明显减小,与完整标本相比,差异有显著性意义(t=3.4P<0.05t=7.2P<0.01)。结论TFCC水平部分具有传递载荷的功能,其不同程度的切除可导致腕关节传递至尺骨轴向载荷的大小发生改变。
Objective To evaluate the effect of the several operative procedures of gradual excision of the horizontal portion of the triangular fibrocartilage complex(TFCC) on ulnar support of the carpus and the therapeutic mechanisms of these operations. Methods Eight upper extremities specimens were taken from fresh young adult cadavers and were mounted in a loading frame. During these experiments, 100 N axial load controlled by MTS universal testing machine was applied across the wrist joint at each position, and the force through ulna was measured by means of pressure sensitive film and the calculation of the computer. Results Removal of one third of the horizontal portion of the TFCC was found to have no marked effect on the forearm axial load transmission (t=2.1,P >0.05). Removal of two thirds or the entire horizontal portion of the TFCC caused a statistically significant difference in the percentage of force transmitted through the ulna compared with the intact force data (t=3.4,P< 0.05;t=7.2,P< 0.01). Conclusion The horizontal portion of the TFCC functions as a cushion for the ulnar carpus, carrying approximately 20% of the axial load of the forearm in a cadaver specimen. The gradual excision of the horizontal portion of the TFCC unloaded the ulna noticeably.
出处
《中华骨科杂志》
CAS
CSCD
北大核心
2001年第8期486-488,共3页
Chinese Journal of Orthopaedics
