Wenger D R, Carollo J J, Wilkerson J A, Wauters K, Herring J A
Spine (Phila Pa 1976). 1982 May-Jun;7(3):265-9. doi: 10.1097/00007632-198205000-00012.
The authors have tested 51 instrumented calf spines in vitro, using a scoliosis simulator, to evaluate the adequacy of fixation and nature of acute failure seen with various methods of scoliosis instrumentation. Tests were performed in compressive loading, rotation, and forward bending on the following instrumentation systems: (I) Harrington distraction, (II) Harrington distraction plus compression connected by transverse approximators, (III) Harrington distraction plus segmental laminar wires, and (IV) Luque double "L" rods plus segmental laminar wires. The study demonstrated that the addition of segmental fixation to scoliosis instrumentation provides improved stability because of (a) multiple fixation sites and (b) prevention of deformity, especially kyphosis, within the instrumented segment (an important contributor to hook cutout when a single Harrington distraction rod is tested). Failure with the Harrington rod was always by fracture at the metal-bone interface, while failure with the Luque method always occurred outside the instrumented segment.
作者使用脊柱侧弯模拟器对51个装有仪器的小牛脊柱进行了体外测试，以评估各种脊柱侧弯器械固定方法的充分性和急性失效的性质。测试在压缩载荷、旋转和前屈状态下对以下器械系统进行：（I）哈林顿撑开；（II）通过横向连接装置连接的哈林顿撑开加压缩；（III）哈林顿撑开加节段性椎板钢丝；（IV）鲁克双“L”棒加节段性椎板钢丝。该研究表明，在脊柱侧弯器械中增加节段性固定可提高稳定性，原因如下：（a）多个固定点；（b）防止器械固定节段内的畸形，尤其是后凸（在测试单个哈林顿撑开棒时，这是导致钩脱出的一个重要因素）。哈林顿棒的失效总是发生在金属-骨界面处的骨折，而鲁克方法的失效总是发生在器械固定节段之外。
