锁定重建钢板应用于髋臼横行后壁骨折的生物力学研究  

BIOMECHANICAL STUDY ON LO CKED RECONSTRUCTION PL ATE FOR INTERNAL FIXATION OF TRANSVERSE AND POSTERIOR WALL ACETABULAR FRACTURE

作　　者：马爱国[1] 裴宝瑞 庞智寅 付久洋 陈国福 刘斌 许博文 吴啸波[3] 

机构地区：[1]唐山市第二医院创伤一科,河北唐山063000 [2]华北理工大学研究生院 [3]河北医科大学第三医院骨伤科

出　　处：《中国修复重建外科杂志》2016年第11期1354-1357,共4页Chinese Journal of Reparative and Reconstructive Surgery

基　　金：唐山市科技局科研项目(12140210 A-5)~~

摘　　要：目的探讨锁定重建钢板行髋臼横行后壁骨折内固定的生物力学稳定性,为其临床应用提供生物力学依据。方法取8具(16个)成人尸体髋臼标本,制备髋臼横行后壁骨折模型;根据随机数字表法分为两组,每组8个标本。实验组采用10孔后柱锁定重建钢板固定,对照组采用10孔后柱重建钢板联合前柱拉力螺钉及后壁螺钉固定。应用生物力学试验机对标本加载至供体体质量的5/6,加载速度15 N/s,计算加载时间并进行垂直加载。通过光栅位移传感器记录四边体内侧横向、骨折端纵向及后壁骨折块位移,比较两组生物力学稳定性。结果实验组四边体内侧横向位移为(1.99±0.32)mm,大于对照组的(1.75±0.22)mm,比较差异无统计学意义(t=—1.735,P=0.105)。实验组骨折端纵向位移及后壁骨折块位移分别为(1.56±049)、(0.86±0.33)mm,均小于对照组的(1.64±0.51)、(1.01±0.35)?mm,但组间比较差异亦无统计学意义(t=0.293,P=0.772;t=1.516,P=0.154)。结论对于髋臼横行后壁骨折,应用锁定重建钢板内固定能提供足够的生物力学稳定性,同时避免了拉力螺钉的使用,显著降低了螺钉植入关节的风险。ObjectiveTo discuss the biomechanical stability of locked reconstruction plate for internal fixation of transverse and posterior wall acetabular fracture so as to provide a reliable basis for clinical application. MethodsThe models of transverse and posterior wall acetabular fracture were established in 16 anti-corrosion acetabular specimens from 8 adult cadavers, which were randomly divided into experimental group and control group （n=8）. Fracture was fixed with 10-hole posterior column locked reconstruction plate in the experimental group, and with 10-hole posterior column reconstruction plate combined with anterior column lag screw and posterior wall screws in the control group. Biomechanical testing machine was used for loading of 5/6 donor body mass the specimen in a speed of 15 N/s; the loading time was calculated and vertical loading.The longitudinal and quadrilateral body displacements of fracture were recorded to compare the biomechanical stability was performed. ResultsThe quadrilateral body displacement of the experimental group[（1.99±0.32） mm] was greater than that of the control group[（1.75±0.22） mm], but there was no significant difference （t=-1.735, P=0.105）. The longitudinal displacement[（1.56±049） mm] and the displacement of the posterior wall fracture block[（0.86±0.33） mm] in the experimental group were lower than those of the control group[（1.64±0.51） and （1.01±0.35） mm], showing no significant difference between 2 groups （t=0.293, P=0.772; t=1.516, P=0.154）. ConclusionFor transverse and posterior wall acetabular fracture, application of locked reconstruction plate can provide sufficient biomechanical stability, reduce the risk of screw placement to acetabular joints.

关 键 词：髋臼横行后壁骨折 锁定重建钢板 生物力学 

分 类 号：R687.3[医药卫生—骨科学] R318.01[医药卫生—外科学]