髋臼前壁骨折模型的建立及不同内固定方式的生物力学稳定性比较

发布时间：2018-12-16 19:12

【摘要】：目的建立髋臼前壁骨折模型,比较4种内固定方式的生物力学稳定性。方法选取20个防腐成人半骨盆标本,建立髋臼前壁骨折模型。将骨折模型随机分为4组,A组采用真骨盆上缘重建接骨板固定,B组采用真骨盆内缘重建接骨板固定,C组采用顺行拉力螺钉固定,D组采用逆行拉力螺钉固定。对各组标本进行轴向压缩实验,测量骨折断端水平位移,计算剪切刚度,比较4组不同内固定方式的稳定性。结果相同加载载荷下,骨折断端水平位移:A组B组C组D组,内固定剪切刚度:D组C组B组A组。载荷为400 N时各组水平位移及内固定剪切刚度差异均无统计学意义(P0.05),载荷为800 N至2000 N时,除C组与D组间水平位移及内固定剪切刚度差异无统计学意义外(P0.05),其余各组间比较差异均有统计学意义(P0.05)。结论髋臼前壁骨折模型可用于髋臼前壁骨折的生物力学分析,采用拉力螺钉固定髋臼前壁骨折的稳定性高于重建接骨板固定方式,其中顺行拉力螺钉固定与逆行拉力螺钉固定的稳定性相似。
[Abstract]:Objective to establish acetabular anterior wall fracture model and compare the biomechanical stability of four internal fixation methods. Methods 20 antiseptic adult hemipelvis specimens were selected to establish acetabular anterior wall fracture model. The fracture model was randomly divided into 4 groups: group A was fixed with the reconstruction plate of the upper edge of the true pelvis, group B with the internal margin of the true pelvis, group C with the anterograde pull screw fixation, group D with the retrograde screw fixation. The axial compression experiments were carried out to measure the horizontal displacement at the fracture end, to calculate the shear stiffness, and to compare the stability of the four groups with different internal fixation methods. Results under the same loading load, the horizontal displacement of fracture end: group A, group B, group C, group D, internal fixation shear stiffness, group D, group C, group B, group A. When the load was 400N, there was no significant difference in the horizontal displacement and the shear stiffness of the internal fixation (P0.05), but the load ranged from 800N to 2000 N. There was no significant difference in horizontal displacement and internal fixation shear stiffness between group C and group D (P0.05), but there were significant differences among other groups (P0.05). Conclusion the model of acetabular anterior wall fracture can be used for biomechanical analysis of acetabular anterior wall fracture. The stability of anterograde lag screw fixation was similar to that of retrograde lag screw fixation.
【作者单位】：华北理工大学研究生学院;开滦总医院普外科;河北医科大学第三医院骨科;
【基金】：河北省唐山市科技支撑项目(14130260B)
【分类号】：R318.01;R683

【相似文献】