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首页> 外文期刊>Open Journal of Urology >Biomechanical Stability of Open-Wedge High Tibial Osteotomy: Comparison of Two Locking Plates
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Biomechanical Stability of Open-Wedge High Tibial Osteotomy: Comparison of Two Locking Plates

机译：楔形高位胫骨截骨术的生物力学稳定性：两个锁定板的比较

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Introduction: Recently, new plates with locking screws have been developed and used for medial open-wedge high tibial osteotomy (HTO). The purpose of this study was to evaluate and compare biomechanical properties of different internal fixations in open-wedge HTO using the two currently available locking plates. Methods: Eight paired fresh-frozen cadaveric lower extremities were vertically embedded in steel boxes. The axial compression load was applied to the legs using the mechanical testing machine. The axial compression load test from 0 N to 550 N and the failure test were performed before and after HTO. One side of the leg of a specimen was fixed with the Puddu locking plate and the other side was fixed with the TomoFix plate to compare the two plates using the same specimen. A mode of failure and vertical displacement of the medial and lateral parts of the tibia at the osteotomy gap was recorded using a video camera in the failure test. The load–displacement data were analyzed to calculate stiffness, failure load, and displacement at failure. Results: The mean failure load was 1471.4 N and 1692.3 N and total vertical displacement at failure was 3.1 mm and 2.9 mm with the Puddu and TomoFix plates, respectively. During axial compression loading, displacements mainly occurred at the lateral osteotomy gap, while the medial gap was well preserved. No significant differences were observed in the failure load, displacement, or mode of failure between the two plates. Conclusions: The Puddu and TomoFix plates had similar biomechanical properties in open-wedge HTO. The results indicated reliable stability after open-wedge HTO without fibular osteotomy.
机译：简介：最近，开发了带有锁定螺钉的新板，并将其用于内侧开口楔高胫骨截骨术（HTO）。这项研究的目的是评估和比较使用两个当前可用的锁定板在楔形HTO中不同内部固定的生物力学性能。方法：将八个成对的新鲜冷冻尸体下肢垂直嵌入钢箱中。使用机械测试机将轴向压缩载荷施加到腿上。在HTO之前和之后进行了从0 N到550 N的轴向压缩载荷测试和破坏测试。样品腿的一侧用Puddu锁定板固定，另一侧用TomoFix板固定，以比较使用同一样品的两个板。在失败测试中，使用摄像机记录了失败模式和胫骨内侧和外侧部分在截骨间隙处的垂直位移。分析了载荷-位移数据以计算刚度，破坏载荷和破坏时的位移。结果：Puddu和TomoFix板的平均破坏载荷分别为1471.4 N和1692.3 N，破坏时的总垂直位移分别为3.1 mm和2.9 mm。在轴向压缩载荷过程中，位移主要发生在外侧截骨间隙处，而内侧间隙则保留得很好。在两个板之间的失效载荷，位移或失效模式上没有观察到显着差异。结论：Puddu和TomoFix板在楔入式HTO中具有相似的生物力学特性。结果表明，在未行腓骨截骨术的情况下，开楔式HTO后具有可靠的稳定性。

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