Development of a novel spike-like auxiliary skeletal anchorage device to enhance miniscrew stability
Development of a novel spike-like auxiliary skeletal anchorage device to enhance miniscrew stability
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DOI：
10.1016/j.ajodo.2015.02.030
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发表时间：
2015-08-01
影响因子：
3
通讯作者：
Kikuchi, Masafumi
中科院分区：
文献类型：
--
作者：
Miyawaki, Shouichi;Tomonari, Hiroshi;Kikuchi, Masafumi
简介：在方丝弓治疗过程中，微型螺钉经常用于骨骼锚定，其临床应用已得到验证。然而，它们的缺点是大约15%的失败率，这主要归因于微螺钉和皮质骨之间的低机械稳定性以及微螺钉靠近牙根。为了解决这些问题，我们开发了一种新型的钉状辅助骨骼支抗装置，用于与微螺钉一起使用，以增加其稳定性。研究方法：在微螺钉每次移位时，比较有和没有辅助骨骼锚固装置的微螺钉之间的固位力。还将组合单元植入2只家兔体内骨中，并在术后4周施加压缩力时目视评估植入情况。结果如下：在每次位移时，组合单元的固位力平均比单独的微螺钉的固位力强约3至5倍。在两只家兔中，植入后4周，辅助锚定装置的穿刺部分嵌入后肢皮质骨约0.3 mm深。结论：辅助骨骼锚固装置可以增加微螺钉稳定性，允许缩短微螺钉，并且能够实现三维绝对锚固。有必要对其临床应用进行进一步评价。
Introduction: Miniscrews are frequently used for skeletal anchorage during edgewise treatment, and their clinical use has been verified. However, their disadvantage is an approximately 15% failure rate, which is primarily attributed to the low mechanical stability between the miniscrew and cortical bone and to the miniscrew's close proximity to the dental root. To solve these problems, we developed a novel spike-like auxiliary skeletal anchorage device for use with a miniscrew to increase its stability. Methods: The retention force was compared between miniscrews with and without the auxiliary skeletal anchorage device at each displacement of the miniscrew. The combined unit was also implanted into the bones of 2 rabbits in vivo, and implantation was visually assessed at 4 weeks postoperatively while the compression force was applied. Results: The retention force of the combined unit was significantly and approximately 3 to 5 times stronger on average than that of the miniscrew alone at each displacement. The spiked portion of the auxiliary anchorage device embedded into the cortical bone of the hind limb at approximately a 0.3-mm depth at 4 weeks postimplantation in both rabbits. Conclusions: The auxiliary skeletal anchorage device may increase miniscrew stability, allow a shortened miniscrew, and enable 3-dimensional absolute anchorage. Further evaluation of its clinical application is necessary.