Dawei Tian, Na Liu, Jun Lei, Wei Jin, Lin Cai
Department of Orthopedics, Zhongnan Hospital of Wuhan University, No.169th Donghu Road, Wuchang District, Wuhan, Hubei, 430071, People's Republic of China.
Clin Biomech (Bristol). 2013 Feb;28(2):129-33. doi: 10.1016/j.clinbiomech.2012.11.007. Epub 2012 Dec 4.
Although there were many different types of fixation techniques for sacroiliac dislocation fracture, the treat remained challenging in posterior pelvic ring injury. The purpose of this study was to evaluate the biomechanical effects of a novel fixation system we designed.
12 human cadavers (L3-pelvic-femora) were used to compare biomechanical stability after reconstruction on the same specimens in four conditions: (1) intact, (2) cable system, (3) plate-pedicle screw system, and (4) cable system and plate-pedicle screw combination system (combination system). Biomechanical testing was performed on a material testing machine for evaluating the stiffness of the pelvic fixation construct in compression and torsion.
The cable system and plate-pedicle screw system alone may be insufficient to resist vertical shearing and rotational loads; however the combination system for unstable sacroiliac dislocation fractures provided significantly greater stability than single plate-pedicle or cable fixation system.
The novel fixation system for unstable sacroiliac dislocation fractures produced sufficient stability in axial compression and axial rotation test in type C pelvic ring injuries. It may also offer a better solution for sacroiliac dislocation fractures.
虽然骶髂关节脱位骨折有多种不同的固定技术，但骨盆后环损伤的治疗仍然具有挑战性。本研究的目的是评估我们设计的一种新型固定系统的生物力学效果。
使用12具人体尸体（L3 - 骨盆 - 股骨）在相同标本上比较四种情况下重建后的生物力学稳定性：（1）完整状态，（2）缆索系统，（3）钢板 - 椎弓根螺钉系统，以及（4）缆索系统与钢板 - 椎弓根螺钉组合系统（组合系统）。在材料试验机上进行生物力学测试，以评估骨盆固定结构在压缩和扭转时的刚度。
单独的缆索系统和钢板 - 椎弓根螺钉系统可能不足以抵抗垂直剪切和旋转载荷；然而，用于不稳定骶髂关节脱位骨折的组合系统比单板 - 椎弓根或缆索固定系统提供了显著更高的稳定性。
用于不稳定骶髂关节脱位骨折的新型固定系统在C型骨盆环损伤的轴向压缩和轴向旋转试验中产生了足够的稳定性。它也可能为骶髂关节脱位骨折提供更好的解决方案。
