肱骨髁间骨折3种内固定的生物力学比较

Biomechanical comparison of three internal fixation methods for intercondylar fracture of humerus

目的对肱骨远端髁间骨折3种内固定方法进行生物力学比较,为临床治疗提供理论依据。方法采用18具新鲜肱骨标本,制成远端“T”型髁间骨折损伤模型,用交叉克氏针加8字钢丝、“Y”型钢板、1/3管形钢板及重建钢板3种方法固定后,进行生物力学研究。结果在同等载荷条件下,1/3管形钢板及重建钢板固定效果最佳,“Y”型钢板次之,而交叉克氏针加8字钢丝刚度最差。结论1/3管形钢板及重建钢板固定牢固,稳定性好,优于其他内固定方法,但操作复杂,在临床上应当根据实际情况进行选择应用。

Objective A biomechanical comparison of three kinds of internal fixation for intercondylar fracture of humerus was, made so as to provide a theoretical basis for clinical practice. Methods 18 fresh humeri were used to reproduce T-type intercondylar fracture, and three different fixation appliances were applied, including cross Kirschner wire with addition of “8” wire, single “Y” type plate, 1/3 tubular plate with reconstruction plate. Biomechanical tests were performed on these specimens. Result Under the same load condition, 1/3 tubular plate with reconstruction plate yielded the best results, while crossing Kirschner wire with “8” wire was the poorest. Conclusion The results showed that 1/3 tubular plate with reconstruction plate was a good internal fixation appliance. It has a proper design and stability, but it is not easy to apply. Therefore, an optimal method should be chosen according to local condition in clinical practice.