垂直不稳定骨盆骨折各种内固定生物力学对比研究

BIOMECHANICAL COMPARISON STUDIES OF DIFFERENT INTERFIXATION FOR VERTICALLY UNSTABLE PELVIC FRACTURE

本文根据生物力学原理．通过选用18具新鲜湿润固定骨盆标本，建立不同内固定骨盆实验力学模型，运用应变、位移电测技术测定与比较了五种不同内固定方法在力学指标上的优劣。结果表明，垂直不稳定骨盆骨折采用冗棒和T形钢板内固定，在强度、刚度与稳定性方面比其余内固定方法更具有优势，两者呈现显著性差异（P＜0．01）。一系列实验结果，为垂直不稳定骨盆骨折的内固定手术治疗提供了理论依据。

According to the biomechanical principle, 18 specimens of human pelvie were selected from freshcadavers and made into samples for biomechanical laboratory test. Using cadaveric pelvicinstrumented with strain gauges displacement instrument compare five different interfixationresults. Blomechanical studies demonstrated utilizing π- shaped rod and T - shaped plates,sufaficient stability of pelvic ring could be Provided. Its the Strength, rigidity and stability appear tooffer distinct biomechanical advantage over the three interfixation method (P<0.01). BiomechamIcal Parameters were provided the theoretical basis in clinical application of different interfixationfor Vertically unstable pelvic fracture.