摘要
目的: 研究桡骨远端骨折后掌倾角及尺偏角改变对桡腕关节的影响。方法: 12只成人上肢标本于距关节面3cm处截骨去除1cm骨块, 制作桡骨远端骨折成角畸形模型。利用压敏片测试桡腕关节面的应力分布和受力面积改变情况。结果: 随着桡腕关节面背倾加大, 舟骨和月骨接触面向关节面背侧移位, 随着背倾角度和桡偏角度的加大, 舟骨的接触面积、接触应力显著减少(P<0. 01 ), 月骨的接触面积、接触应力显著增大(P<0. 01)。结论: 桡腕关节面背倾10°以上时, 桡偏10°以上时, 舟骨和月骨的接触面积及接触应力有显著变化, 影响腕关节功能。
Objective:To investigate the impact of tilt changes due to distal radius fractures on wrist joint.Method:Twelve upper extremity specimens were selected. Malunion for distal radius fracture was simulated by way of resecting 1.0cm of the radius 3cm proximal to the distal radial articular. Pressure receptor was applied to study the changes of pressure distribution and pressure load in the contacting area.Result: With the distal articular surface angulating dorsally, the contacting point of navicular and lunate moved dorsally and the contacting area and pressure changed with it. As the angular reached more than 10 degrees, the contacting area and pressure to navicular decreased significantly while that of lunare increased significantly ( P <0.01).Conclusion:Contacting area and pressure to the navicular and lunare show significant changes when the radiocarpal joint angular reached more than 10 degrees and it leads to significant influence on the wrist joint.
出处
《中国矫形外科杂志》
CAS
CSCD
北大核心
2005年第10期750-752,共3页
Orthopedic Journal of China
