目的 建立腕关节三维有限元模型研究腕关节舟月骨间韧带（Scapholunate interosseous ligament,SLIL）在腕部不同运动中的应力分布。 方法 选取正常腕关节CT数据，将其导入Mimics软件构建腕关节三维有限元模型，分析腕关节不同运动方向受力时的SLIL应力分布。 结果 随背伸角度增大，SLIL应力增大，背伸角度增加到 90°时，SLIL受到最大应力为1.3787 MPa。背伸角度为 30°时，腕关节掌屈时SLIL受到的最大应力为 0.1596 MPa，掌屈角度增加到 90°时，SLIL的最大应力降低至0.2452 MPa。桡偏 25°时，SLIL受到的最大应力为0.8145 MPa，尺偏 25°时，SLIL受到的最大应力为 0.1356 MPa。腕关节做桡侧受力 20N 时，SLIL受到的最大应力为 0.4465 MPa，尺侧受力 20N 时，SLIL受到的最大应力为 0.4635 MPa。 结论 腕关节三维有限元模型可以模拟SLIL在腕部不同运动中的受力情况。腕关节背伸角度达90°时，SLIL的应力最大。做尺偏、桡偏动作时，相同偏转角度下，SLIL桡偏时最大应力是尺偏最大应力的6倍左右。
Abstract
Objective To study the stress distribution of the scapholunate interosseous ligament(SLIL) of the wrist joint during different movements of the wrist by established a three-dimensional finite element model of the wrist joint. Methods The CT data of normal wrist joints were selected and imported into Mimics software to construct a three-dimensional finite element model of the wrist joint.. The SLIL stress distribution of the wrist joint under different motion directions was analyzed. Results With the increasing of the dorsiflexion angle, the SLIL stress increased. When the dorsiflexion angle increased to 90°, the maximum stress of SLIL was 1.3787 MPa. When the dorsiflexion angle was 30°, the maximum stress of SLIL was 0.1596 MPa. When the angle of palmar curvature increased to 90°, the maximum stress of SLIL reduced to 0.2452 MPa. The maximum stress of SLIL was 0.8145 MPa at 25° radial deviation, and 0.1356 MPa at 25° ulnar deviation. The maximum stress of SLIL was 0.4465 MPa when the radial force was applied to the wrist joints at 20 N, and 0.4635 MPa when the ulnar force was applied at 20 N. Conclusions The three-dimensional finite element model of the wrist joint can simulate the force of SLIL in different wrist movements. The stress of SLIL is maximum when the wrist joint dorsiflexion angle reaches 90°. When doing ulnar deviation and radial deviation, the maximum stress of SLIL radial deviation is about 6 times of the maximum stress of ulnar deviation at the same deflection angle.
关键词
/
腕关节 /
舟骨 /
月骨 /
骨间韧带 /
有限元分析
Key words
Carpal joints /
Scaphoid bone /
Lunate bone /
Interosseous ligament /
Finite element analysis
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基金
云南省创伤骨科临床医学中心（ZX20191001）
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