Biomechanical Analysis of Orthodontic Miniscrew-Assisted Rapid Palatal Expansion On Dental and Bone Tissues: A Finite-Element Study

Egon Mamboleo, Abdelhak Ouldyerou, Khaled Alsharif, Peter Ngan, A. Merdji, Sandipan Roy, O. Mukdadi
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Abstract

This study aims to delineate the biomechanical responses in both soft and hard tissues, alongside the interactions within the surrounding bone of a human skull subjected to clinical loadings generated by a miniscrew-assisted rapid palatal expansion (MARPE) device. Cone-beam computed tomography (CBCT) scans of a 20-year-old female skull were segmented. The skull bones were meticulously modeled to reconstruct a comprehensive 3D model for finite-element analysis (FEA). A displacement of 0.125 mm was applied on each side (0.25 mm total) of the MARPE device to simulate one complete turn of the jackscrew. The outcomes revealed that the miniscrews experienced a maximum equivalent von Mises stress of 264.91 MPa. Notably, the separation of the midpalatal suture exhibited a quasi-parallel deformation with an average displacement of 0.247 mm and a standard deviation of 0.00667 mm. The ratio of the rotational angle to the lateral displacement of the zygomaticomaxillary complex was 0.6436 degree/mm. No Fracture of miniscrews was observed during the activation of one turn per day.
正畸微型螺钉辅助快速腭扩展对牙齿和骨组织的生物力学分析:有限元研究
本研究旨在描述软组织和硬组织的生物力学反应,以及在微型螺钉辅助快速腭部扩张(MARPE)装置产生的临床载荷作用下人头骨周围骨骼的相互作用。对一个 20 岁女性头骨的锥形束计算机断层扫描(CBCT)进行了分割。对头骨进行了细致的建模,以重建用于有限元分析(FEA)的综合三维模型。在 MARPE 装置的两侧各施加 0.125 毫米(总计 0.25 毫米)的位移,以模拟千斤顶螺杆旋转一圈。结果显示,微型螺杆的最大等效冯米斯应力为 264.91 兆帕。值得注意的是,腭中缝的分离呈现准平行变形,平均位移为 0.247 毫米,标准偏差为 0.00667 毫米。颧颌复合体旋转角度与侧向位移之比为 0.6436 度/毫米。在每天一圈的激活过程中,未发现微型螺钉断裂。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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