Biomechanical Effects of Various Bone-Implant Interfaces on the Stability of Orthodontic Miniscrews: A Finite Element Study.
Biomechanical Effects of Various Bone-Implant Interfaces on the Stability of Orthodontic Miniscrews: A Finite Element Study.
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DOI：
10.1155/2017/7495606
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发表时间：
2017
影响因子：
--
通讯作者：
Fan Y
中科院分区：
文献类型：
--
作者：
Tan F;Wang C;Yang C;Huang Y;Fan Y
假体植入需要骨整合，但正畸微型螺钉的各种骨-种植体界面将引起正畸医生的极大兴趣。关于稳定微型螺钉所需的骨-种植体骨整合的最小量，目前还没有明确的共识。本研究的目的是研究不同骨-种植体界面对微型螺钉及其周围组织的影响。 使用有限元分析，本文采用了表示骨-种植体界面的先进方法，并在有限元模型中实现了不同程度的骨-种植体骨整合。总共进行了 26 种不同的有限元分析。计算并比较了应力/应变模式，并评估了微型螺钉的位移。 应力/应变分布随着不同的骨-植入物界面而变化。在 0% 骨整合的情况下，预测分布相当均匀。 15%骨整合后，应力/应变逐渐集中在皮质骨区域。在无骨整合条件下，微型螺钉经历了最大的位移。最大位移从0%急剧下降到3%，并趋于稳定。 从生物力学角度来看，可以建议在骨整合约 15% 后对微型螺钉施加正畸负载，而不会损失任何稳定性。
Osseointegration is required for prosthetic implant, but the various bone-implant interfaces of orthodontic miniscrews would be a great interest for the orthodontist. There is no clear consensus regarding the minimum amount of bone-implant osseointegration required for a stable miniscrew. The objective of this study was to investigate the influence of different bone-implant interfaces on the miniscrew and its surrounding tissue. Using finite element analysis, an advanced approach representing the bone-implant interface is adopted herein, and different degrees of bone-implant osseointegration were implemented in the FE models. A total of 26 different FE analyses were performed. The stress/strain patterns were calculated and compared, and the displacement of miniscrews was also evaluated. The stress/strain distributions are changing with the various bone-implant interfaces. In the scenario of 0% osseointegration, a rather homogeneous distribution was predicted. After 15% osseointegration, the stress/strains were gradually concentrated on the cortical bone region. The miniscrew experienced the largest displacement under the no osseointegra condition. The maximum displacement decreases sharply from 0% to 3% and tends to become stable. From a biomechanical perspective, it can be suggested that orthodontic loading could be applied on miniscrews after about 15% osseointegration without any loss of stability.