University of Luxembourg, Research Unit in Engineering Science, Luxembourg, Luxembourg.
Centre Hospitalier de Luxembourg, Service de Traumatologie, Luxembourg, Luxembourg.
Int J Numer Method Biomed Eng. 2020 Apr;36(4):e3319. doi: 10.1002/cnm.3319. Epub 2020 Feb 27.
This study focuses on the influence of the softening and stiffening of pubic symphysis on the load distribution within the bones of the pelvic ring under the physiological loadings of the single leg stance. Muscle forces and joint reaction forces were first determined by inverse dynamics and applied to a linear finite element model of the pelvis. With normal pubic symphysis stiffness, high Von Mises stresses are located on the anterior surface to the sacrum around the sacroiliac joint and on the superior ramus, both on the side of the weight-bearing leg. Softening of the pubic symphysis redirects the load backward, decreases the stresses at the anterior pelvis, and increases them at the posterior pelvis. A stiffening of the pubic symphysis redirects the load forward, increases the load on the posterior pelvis, and decreases them at the anterior pelvis. This investigation highlights the significance of the pubic symphysis on the load distribution of the pelvis and in maintaining the integrity of the structures. Its role should not be neglected when analyzing the pelvis.
本研究关注耻骨联合软化和僵硬对单腿站立生理负荷下骨盆环内骨骼负荷分布的影响。首先通过反向动力学确定肌肉力和关节反作用力，并将其应用于骨盆的线性有限元模型。在正常耻骨联合刚度下，高 Von Mises 应力位于骶骨前方靠近骶髂关节和承重腿一侧的上支。耻骨联合软化会将负荷向后转移，降低前骨盆的应力，并增加后骨盆的应力。耻骨联合僵硬会将负荷向前转移，增加后骨盆的负荷，并降低前骨盆的负荷。本研究强调了耻骨联合在骨盆负荷分布和维持结构完整性方面的重要性。在分析骨盆时，不应忽视其作用。
