锁定重建钢板应用于髋臼横行后壁骨折的生物力学研究

发布时间：2018-01-01 05:02

本文关键词：锁定重建钢板应用于髋臼横行后壁骨折的生物力学研究　出处：《中国修复重建外科杂志》2016年11期 　论文类型：期刊论文

【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。
[Abstract]:Objective to investigate the locking reconstruction plate for acetabular posterior wall fracture fixation and biomechanical stability, provide biomechanical basis for the clinical application. Methods 8 (16) adult acetabular specimens, preparation of acetabular posterior wall fracture model; they were randomly divided into two groups, 8 specimens in each group. The experimental group by using the 10 hole posterior locking reconstruction plate fixation, the control group using 10 hole reconstruction plate combined with posterior anterior screw and posterior screw fixation. Biomechanical test machine for loading samples to the donor body mass 5/6, the loading speed is 15 N/s, calculate the loading time and vertical loading. Through the grating displacement sensor to record four medial lateral body block, displacement and longitudinal end fracture of posterior wall fractures, were compared between the two groups. Results the biomechanical stability of transverse displacement inside the experimental group four body is (1.99 + 0.32) mm, than the control group (1.75 + 0.22 Mm), the difference was not statistically significant (t= 1.735, P=0.105). The experimental group fracture block displacement and longitudinal displacement of posterior wall fractures were (1.56 + 049), (0.86 + 0.33) mm, were less than the control group (1.64 + 0.51), (1.01 + 0.35) mm, but also? There was no significant difference between groups (t=0.293, P=0.772; t=1.516, P=0.154). Conclusion for transverse acetabular posterior wall fractures, locking reconstruction plate fixation can provide sufficient biomechanical stability, while avoiding the use of lag screw, significantly reducing the risk of screw joint.

【作者单位】：唐山市第二医院创伤一科;华北理工大学研究生院;河北医科大学第三医院骨伤科;
【基金】：唐山市科技局科研项目(12140210 A-5)~~
【分类号】：R687.3;R318.01
【正文快照】： 髋臼横行后壁骨折是临床常见髋臼骨折类型之一,Letournel和Judet将髋臼骨折分成简单和复杂两种类型,髋臼横行后壁骨折属于复杂类型[1]。该类型髋臼骨折常存在髋臼关节面台阶征及头臼匹配不良,保守治疗往往预后不佳,需手术治疗。关节面台阶征3 mm者,需要手术切开复位内固定治

【相似文献】