OBJECTIVES The aim of this study was to biomechanically compare three different fixation methods for the fixation of anterior column posterior hemitransverse type acetabular fracture (ACPHT). METHODS ACPHT fracture models were created on twenty-four foam cortical shell artificial hemipelvis models. Three fixation methods were assessed - Group 1: posterior column lag screws over a suprapectineal plate; Group 2: Posterior column lag screws over a suprapectineal plate and an infrapectineal plate; Group 3: A suprapectineal plate and a vertical infrapectineal plate. Stiffness and displacement amounts of fixation methods under dynamic and static axial loading conditions were measured. RESULTS In the dynamic and static tests, Group 3 showed the less stable fixation compared to Group 2. There was no statistically significant difference between the stiffness values of the fixation groups. In the static tests, there was no statistically significant difference between Group 1 and 2, although less displacements were obtained in Group 2. CONCLUSIONS A combination of posterior lag screws over a suprapectineal plate and an infrapectineal plate supporting the pelvic brim along both sides of the linea terminalis resulted in a better fixation construct than a suprapectineal plate accompanying with a vertical infrapectineal plate provide better stability with less fracture displacement.

中文翻译：

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使用骨盆前入路对三种不同的固定技术治疗前柱后半横断髋臼骨折的生物力学比较。

目的本研究的目的是生物力学比较三种不同的固定方法来固定前柱后半横断型髋臼骨折（ACPHT）。方法在二十四个泡沫皮质壳人工半骨盆模型上建立ACPHT骨折模型。评估了三种固定方法-第1组：在镜下板上的后柱拉力螺钉；第2组：在后上睑板和下腹膜板上固定后柱拉力螺钉；第3组：上睑板和垂直下睑板。测量了固定方法在动态和静态轴向载荷条件下的刚度和位移量。结果在动态和静态测试中，第3组的固定稳定性低于第2组。固定组的刚度值之间没有统计学上的显着差异。在静态测试中，第1组和第2组之间没有统计学上的显着差异，尽管在第2组中获得的位移较少。结论后方上斜螺钉固定在镜下板上，而镜下板沿骨盆两侧支撑骨盆边缘与垂直上方的腹膜上板相伴的上睑板相比，终末线可产生更好的固定结构，从而提供更好的稳定性和更少的骨折移位。