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首页> 外文期刊>The Journal of foot and ankle surgery: official publication of the American College of Foot and Ankle Surgeons >Fixation of the offset V osteotomy: Mechanical testing of 4 constructs.
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Fixation of the offset V osteotomy: Mechanical testing of 4 constructs.

机译：偏移V型截骨术的固定：4种结构的机械测试。

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The purpose of this study was to assess 4 methods of fixation for the offset V osteotomy. Maximum load, failure energy, and stiffness were determined in a control group and in 4 different test models. There were 10 specimens for each group. The control group consisted of intact first ray sawbones. An offset V osteotomy was performed on each specimen in each of the 4 test groups. The osteotomies were fixated either with two 2.0-mm cortical screws, two 2.7-mm cortical screws, two 3.5-mm cortical screws, or one 2.7-mm cortical screw and a 0.045-in Kirschner wire, respectively. Each model was then loaded to failure with a computerized hydraulic-tensile testing machine. Results for maximum load to failure for all 4 fixation constructs showed a mean ranging from 113.0 to 144.0 N, a mean energy to failure ranging from 272.2 to 365.0 J, and a mean stiffness ranging from 21.3 to 27.0 N/mm. There were no statistically significant differences detected among the individual constructs. In the group fixated with 3.5-mm screws, there were statistically significant differences in all 3 parameters compared with the control group. In the groups fixated with 2.7-mm screws, 2.0-mm screws, and the 2.7-mm screw and Kirschner wire, there were statistically significant differences in the maximum load and the failure energy, but not in stiffness, when compared with the control group. These findings suggest that all 4 constructs provide similar mechanical properties when utilized for the fixation of the offset V osteotomy. (The Journal of Foot & Ankle Surgery 42(2):63-67, 2003)
机译：这项研究的目的是评估偏移V型截骨术的4种固定方法。在对照组和4个不同的测试模型中确定最大载荷，破坏能量和刚度。每组有10个标本。对照组由完整的第一射线锯骨组成。在4个测试组的每组中，对每个样本进行了V型截骨术。分别用两个2.0毫米皮质螺钉，两个2.7毫米皮质螺钉，两个3.5毫米皮质螺钉或一个2.7毫米皮质螺钉和0.045英寸Kirschner钢丝固定截骨术。然后，使用计算机化的液压拉伸试验机将每个模型加载失败。所有4种固定结构的最大破坏载荷结果均值显示为113.0至144.0 N，平均破坏能量为272.2至365.0 J，平均刚度为21.3至27.0 N / mm。在各个构建体之间未检测到统计学上的显着差异。在用3.5毫米螺钉固定的组中，与对照组相比，所有3个参数在统计学上都有显着差异。与对照组相比，在用2.7毫米螺钉，2.0毫米螺钉以及2.7毫米螺钉和克氏针固定的组中，最大载荷和破坏能量有统计学差异，但刚度没有统计学差异。 。这些发现表明，当用于偏移V型截骨术的固定时，所有4种结构均提供相似的机械性能。 （《足踝外科杂志》 42（2）：63-67，2003）

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