A finite element analysis of periodontal ligament fluid mechanics response to occlusal loading based on hydro-mechanical coupling model

IF 2.2 4区 医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE Archives of oral biology Pub Date : 2024-05-22 DOI:10.1016/j.archoralbio.2024.106008
Zhongyu Wang , Sa Du , Huilin Zhu , Ke Yi , Zhihui Tang , Qing Li
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Abstract

Objective

Considering fluid stimulation is one of the essential biomechanical signals for periodontal tissues, this study aims to characterizing fluid mechanics response during occlusal loading by a hydro-mechanical coupling model for periodontal ligament.

Design

Models simulating periodontium with normal bone height and with intraosseous defects were built with three mechanical modules: tooth, periodontal ligament and alveolar bone. Tooth was modeled as linear elastic, and periodontal ligament and alveolar bone as a hydro-mechanical coupling model. Transient analyses under dynamic occlusal loading were performed. Fluid dynamics within periodontal ligament space was simulated and visualized by post-processing module.

Results

Reciprocating oscillatory flow occurred within the periodontal ligament under occlusal loading. Higher pore pressure and fluid velocity were observed in furcation and apical regions compared to mid-root and cervical regions. Intraosseous defects increased pore pressure and fluid velocity within the periodontal ligament, most significantly near the defect.

Conclusion

Based on the results of the hydro-mechanical coupling model, significant oscillatory fluid motion is observed within the periodontal ligament under occlusal loading. Particularly, higher fluid velocity is evident in the furcation and apical areas. Additionally, Intraosseous defects significantly enhance fluid motion within the periodontal ligament.

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基于流体力学耦合模型的牙周韧带流体力学对咬合负荷响应的有限元分析
考虑到流体刺激是牙周组织重要的生物力学信号之一,本研究旨在通过牙周韧带的流体力学耦合模型来描述咬合负荷时的流体力学反应。牙齿为线性弹性模型,牙周韧带和牙槽骨为流体力学耦合模型。在动态咬合负荷下进行了瞬态分析。结果在咬合负荷下,牙周韧带内出现了往复振荡流。与中根和牙颈部相比,在窝沟和根尖区域观察到更高的孔隙压力和流体速度。结论根据水力机械耦合模型的结果,在咬合负荷下牙周韧带内观察到明显的振荡流体运动。特别是在窝沟和根尖区域,流体速度明显更高。此外,骨内缺损也会显著增强牙周韧带内的流体运动。
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来源期刊
Archives of oral biology
Archives of oral biology 医学-牙科与口腔外科
CiteScore
5.10
自引率
3.30%
发文量
177
审稿时长
26 days
期刊介绍: Archives of Oral Biology is an international journal which aims to publish papers of the highest scientific quality in the oral and craniofacial sciences. The journal is particularly interested in research which advances knowledge in the mechanisms of craniofacial development and disease, including: Cell and molecular biology Molecular genetics Immunology Pathogenesis Cellular microbiology Embryology Syndromology Forensic dentistry
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