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首页> 外文期刊>Injury >Can DCP and LCP plates generate more compression? The effect of multiple eccentrically placed screws and their drill positioning guides.
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Can DCP and LCP plates generate more compression? The effect of multiple eccentrically placed screws and their drill positioning guides.

机译：DCP和LCP板会产生更多压缩吗？多个偏心放置的螺钉及其钻头定位导轨的作用。

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AIMS: The purpose of this biomechanical study was to assess the capacity of dynamic and locking compression plates (DCP and LCP) in improving fracture compression through the use of multiple compression screws, and the effect of alternating their placement between the two sides of the fracture compared with placing them all on one side. The study also compared fracture compression between DCP and LCP, and between the loading and universal drill guides in DCP. MATERIALS AND METHODS: Fracture compression was measured using a customised load cell placed in a transverse osteotomy in synthetic bone models. The starting pressure across the osteotomy site was standardised to allow comparison. Large fragment DCP and LCP plates were used for fixation. The eccentrically placed compression screws were inserted in two sequences: all on the initial compression screw side, or alternating between the initial compression and neutral sides. In the DCP, the effect of using the universal guide for eccentric screw insertion point was compared with the loading guide. RESULTS: In the DCP, the second eccentrically placed screw improved fracture compression in both sequences (p=0.002). A third eccentrically placed screw improved compression only when placed in alternating sequence (p=0.002), whereas the fourth screw had no significant effect (p=0.13). The universal guide generated higher compression than the loading guide (p=0.0001). In the LCP, fracture compression significantly improved following insertion of a second compression screw (p=0.002), but the initial neutral screw failed to re-engage completely into its hole due to lack of space for horizontal gliding towards the fracture. There was no significant difference in compression between the first two compression screws in DCP and LCP (p=0.64, 0.92). CONCLUSION: Fracture compression can be improved either using multiple eccentrically placed screws alternated between the two sides of the plate in LCP and DCP, or by the use of a universal drill guide in DCP. Although the compression hole in the LCP is shorter, it generates compression comparable to the DCP.
机译：目的：这项生物力学研究的目的是评估动态和锁定加压板（DCP和LCP）通过使用多个加压螺钉来改善骨折加压的能力，以及交替将其放置在骨折两侧之间的效果与将它们全部放在一侧相比。该研究还比较了DCP和LCP之间，以及DCP中的加载和通用钻孔导向之间的裂缝压缩。材料与方法：使用定制的称重传感器在合成骨模型的横向截骨术中测量骨折受压情况。跨截骨部位的起始压力已标准化，可以进行比较。大片段DCP和LCP板用于固定。偏心放置的压缩螺钉按两个顺序插入：全部在初始压缩螺钉侧，或在初始压缩侧和中性侧之间交替。在DCP中，将通用导向器用于偏心螺钉插入点的效果与加载导向器进行了比较。结果：在DCP中，第二个偏心放置的螺钉在两个序列中均改善了骨折压缩（p = 0.002）。仅当以交替顺序放置时，第三个偏心放置的螺钉才能改善压缩效果（p = 0.002），而第四个偏心螺钉则没有显着效果（p = 0.13）。通用导轨产生比加载导轨更高的压缩力（p = 0.0001）。在LCP中，插入第二根加压螺钉后（p = 0.002），骨折的受压明显改善，但是由于缺乏向水平方向滑动的空间，最初的中性螺钉无法完全重新啮合到其孔中。 DCP和LCP中的前两个压缩螺钉之间的压缩没有显着差异（p = 0.64，0.92）。结论：在LCP和DCP中，通过在板的两侧之间交替使用多个偏心放置的螺钉，或者在DCP中使用通用的钻孔导向器，可以改善骨折压缩。尽管LCP中的压缩孔较短，但它产生的压缩程度可与DCP媲美。

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