Wake Hirofumi, Hashizume Hiroyuki, Nishida Keiichiro, Inoue Hajime, Nagayama Noriyuki
Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8558, Japan.
J Orthop Sci. 2004;9(1):44-50. doi: 10.1007/s00776-003-0735-6.
Fracture-dislocations of the coronoid and olecranon were produced experimentally, and their onset mechanisms were analyzed to clarify the effects of compression force on the coronoid and olecranon. The study used two-dimensional finite element method (2D-FEM) simulations and static loading experiments. The latter applied axial force distally to 40 cadaveric elbows. Posterior fracture-dislocations occurred between 15 degrees of extension and 30 degrees of flexion, anterior or posterior fracture-dislocations at 60 degrees, and only anterior fracture-dislocations at 90 degrees. Injuries were mainly to anterior or posterior support structures. The 2D-FEM simulations showed that the stress concentration areas moved from the coronoid process to the olecranon as position changed from extension to flexion. The very high frequency of concurrent fracture-dislocations of radial head or neck in the current study indicated that the radial head may also function as a stabilizer in the anterior support system.
通过实验制造了冠状突和鹰嘴的骨折脱位，并分析了它们的发病机制，以阐明压缩力对冠状突和鹰嘴的影响。该研究使用了二维有限元方法（2D-FEM）模拟和静态加载实验。后者对40个尸体肘部向远侧施加轴向力。后骨折脱位发生在伸展15度至屈曲30度之间，前或后骨折脱位发生在60度时，仅前骨折脱位发生在90度时。损伤主要累及前或后支撑结构。二维有限元模拟显示，随着位置从伸展变为屈曲，应力集中区域从冠状突转移到鹰嘴。本研究中桡骨头或颈部同时发生骨折脱位的频率非常高，表明桡骨头在前支撑系统中也可能起到稳定作用。
