Department of Orthopaedic Surgery, University of Utah School of Medicine, Salt Lake City, Utah 84108, USA.
J Arthroplasty. 2013 Jan;28(1):178-86. doi: 10.1016/j.arth.2012.04.031. Epub 2012 May 15.
Pelvic discontinuity in revision total hip arthroplasty presents problems with component fixation and union. A construct was proposed based on bicolumnar fixation for transverse acetabular fractures. Each of 3 reconstructions was performed on 6 composite hemipelvises: (1) a cup-cage construct, (2) a posterior column plate construct, and (3) a bicolumnar construct (no. 2 plus an antegrade 4.5-mm anterior column screw). Bone-cup interface motions were measured, whereas cyclical loads were applied in both walking and descending stair simulations. The bicolumnar construct provided the most stable construct. Descending stair mode yielded more significant differences between constructs. The bicolumnar construct provided improved component stability. Placing an antegrade anterior column screw through a posterior approach is a novel method of providing anterior column support in this setting.
在翻修全髋关节置换术中，骨盆不连续性会导致组件固定和融合出现问题。基于双柱固定治疗横向髋臼骨折，提出了一种结构。在 6 个复合半骨盆上分别进行了 3 种重建：（1）杯笼结构，（2）后柱钢板结构，和（3）双柱结构（第 2 种加顺行 4.5 毫米前柱螺钉）。测量了骨杯界面运动，同时在步行和下楼梯模拟中施加了循环载荷。双柱结构提供了最稳定的结构。下楼梯模式使结构之间的差异更为显著。双柱结构提供了更好的组件稳定性。从前路经后路置入顺行前柱螺钉是在这种情况下提供前柱支撑的一种新方法。
