不同内固定方式治疗髋臼顶压缩骨折后髋臼负重区接触特性的研究
发布时间：2018-10-19 10:15
【摘要】：目的建立髋臼顶压缩骨折模型,采用压敏片技术测量并探讨3种不同内固定方式固定后髋臼负重区接触特性。方法将16具新鲜成人半骨盆标本随机均分为4组,每组4具。D组为完整髋臼对照组;其余3组制备髋臼顶压缩骨折模型后,A组采用重建接骨板固定方法、B组采用顺行排钉螺钉固定方法、C组采用逆行排钉螺钉固定方法固定骨折。将压敏片贴于股骨头上,于倒置的单足站立位行轴向加载压缩试验,分别测量各组髋臼负重区的负重区面积、平均应力及峰值应力。结果载荷为500 N时,D组髋臼负重区面积显著高于其余各组,平均应力和峰值应力显著低于其余各组,差异均有统计学意义(P0.05)。B、C组髋臼负重区面积显著高于A组,平均应力及峰值应力显著低于A组,差异均有统计学意义(P0.05);B、C组间比较上述指标差异均无统计学意义(P0.05)。结论对于髋臼顶压缩骨折,即使行解剖复位并坚强内固定,髋臼负重区接触特性也不能恢复至正常水平;顺行及逆行排钉螺钉固定与重建接骨板固定相比,能够增加髋臼负重区面积,降低平均应力及峰值应力,可降低创伤性关节炎的发生率。
[Abstract]:Objective to establish the acetabular top compression fracture model and to measure and study the contact characteristics of the acetabular loaded area after three different internal fixation methods. Methods Sixteen fresh adult hemipelvis specimens were randomly divided into 4 groups, 4 in each group. Group D was a complete acetabular control group. After the model of acetabular parietal compression fracture was made in the other three groups, reconstruction plate fixation was used in group A, anterograde screw fixation was used in group B, and retrograde screw fixation was used in group C. The pressure sensitive film was attached to the femoral head, and the axial loading compression test was carried out in the inverted standing position. The area of the load-bearing area, the average stress and the peak stress of the acetabular area in each group were measured respectively. Results when the load was 500 N, the area of acetabular load area in group D was significantly higher than that in other groups, and the mean stress and peak stress were significantly lower in group D than in other groups (P0.05). The mean stress and peak stress of group A were significantly lower than that of group A, the differences were statistically significant (P0.05), and there was no significant difference between group B and C (P0.05). Conclusion for acetabular parietal compression fracture, the contact characteristics of acetabular bearing area can not be restored to normal level even if anatomical reduction and rigid internal fixation are performed, and the anterograde and retrograde screw fixation can not return to normal level, compared with reconstruction plate fixation. It can increase the area of the acetabular load area, reduce the average stress and peak stress, and reduce the incidence of traumatic arthritis.
【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】：唐山市科技支撑项目(14130260B)~~
【分类号】：R687.4
本文编号：2280831
[Abstract]:Objective to establish the acetabular top compression fracture model and to measure and study the contact characteristics of the acetabular loaded area after three different internal fixation methods. Methods Sixteen fresh adult hemipelvis specimens were randomly divided into 4 groups, 4 in each group. Group D was a complete acetabular control group. After the model of acetabular parietal compression fracture was made in the other three groups, reconstruction plate fixation was used in group A, anterograde screw fixation was used in group B, and retrograde screw fixation was used in group C. The pressure sensitive film was attached to the femoral head, and the axial loading compression test was carried out in the inverted standing position. The area of the load-bearing area, the average stress and the peak stress of the acetabular area in each group were measured respectively. Results when the load was 500 N, the area of acetabular load area in group D was significantly higher than that in other groups, and the mean stress and peak stress were significantly lower in group D than in other groups (P0.05). The mean stress and peak stress of group A were significantly lower than that of group A, the differences were statistically significant (P0.05), and there was no significant difference between group B and C (P0.05). Conclusion for acetabular parietal compression fracture, the contact characteristics of acetabular bearing area can not be restored to normal level even if anatomical reduction and rigid internal fixation are performed, and the anterograde and retrograde screw fixation can not return to normal level, compared with reconstruction plate fixation. It can increase the area of the acetabular load area, reduce the average stress and peak stress, and reduce the incidence of traumatic arthritis.
【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】：唐山市科技支撑项目(14130260B)~~
【分类号】：R687.4
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