Stuart J Elkowitz, Erik N Kubiak, Daniel Polatsch, John Cooper, Frederick J Kummer, Kenneth J Koval
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引用次数: 0
摘要
为了确定两种不同的无头螺钉设计对模拟肱骨小头骨折的固定效果，我们制作了6对匹配的肱骨小头骨折标本。在配对实验设计中将Acutrac加压螺钉与Herbert螺钉进行比较。所有的标本都进行了模拟生理负荷的循环试验。确定了小头的位移作为循环次数和破坏载荷的函数。在2000个周期时，Acutrac螺钉比Herbert螺钉更稳定，0.17 mm比1.57 mm (p < 0.02)。Acutrac固定也有更高的失效负荷，154 N比118 N (p < 0.05)。在本生物力学研究中，与Herbert螺钉相比，Acutrac螺钉对模拟肱骨小头骨折的固定更为稳定。这似乎与这些螺钉的设计有关。
Comparison of two headless screw designs for fixation of capitellum fractures.
In order to determine the effects of two different headless screw designs on fixation of simulated capitellum fractures six matched pairs of embalmed humeri had simulated capitellum fractures created. Fixation with Acutrac compression screws was compared to Herbert screws in a matched pair experimental design. All specimens were cyclically tested with simulated physiologic loading. Both displacement of the capitellum as a function of the number of cycles and failure loads were determined. Fixation by the Acutrac screws was significantly more stable than Herbert screws at 2000 cycles, 0.17 mm wersus 1.57 mm (p < 0.02) The Acutrac fixation also had a higher failure load, 154 N versus 118 N (p < 0.05). The Acutrac screws tested in this biomechanical study provided more stable fixation of simulated capitellum fractures than Herbert screws. This appears to be related to the design of these screws.
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