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首页> 外文期刊>Journal of Biomechanics >The effects of the periodontal ligament on mandibular stiffness: a study combining finite element analysis and geometric morphometrics.
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The effects of the periodontal ligament on mandibular stiffness: a study combining finite element analysis and geometric morphometrics.

机译：牙周韧带对下颌刚度的影响：一种有限元分析与几何形态学仪的研究。

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摘要

It is generally accepted that the periodontal ligament (PDL) plays a crucial role in transferring occlusal forces from the teeth to the alveolar bone. Studies using finite element analysis (FEA) have helped to better understand this role and show that the stresses and strains in the alveolar bone are influenced by whether and how PDL is included in FE models. However, when the overall distribution of stresses and strains in crania and mandibles are of interest, PDL is often not included in FE models, although little is known about how this affects the results. Here we study the effect of representing PDL as a layer of solid material with isotropic homogeneous properties in an FE model of a human mandible using a novel application of geometric morphometrics. The results show that the modelling of the PDL affects the deformation and thus strain magnitudes not only of the alveolar bone around the biting tooth, but that the whole mandible deforms differently under load. As a result, the strain in the mandibular corpus is significantly increased when PDL is included, while the strain in the bone beneath the biting tooth is reduced. These results indicate the importance of the PDL in FE studies. Thus we recommend that the PDL should be included in FE models of the masticatory apparatus, with tests to assess the sensitivity of the results to changes in the Young's modulus of the PDL material.
机译：通常接受牙周韧带（PDL）在将咬合力从牙齿转移到肺泡骨中起着至关重要的作用。使用有限元分析（FEA）的研究有助于更好地理解这种作用，并表明肺泡骨中的应力和菌株受到FE模型中是否包括PDL是否和PDL的影响。然而，当Crania和颌骨中的应力和菌株的总体分布感兴趣时，PDL通常不包括在FE模型中，尽管关于这对结果的影响很少。在这里，我们研究了将PDL作为固体材料层的效果，其使用几何形态学仪的新型薄荷的FE模型中具有各向同性均匀性质。结果表明，PDL的建模影响变形，因此不仅在咬牙齿周围的肺泡骨骼的应变幅度，而且整个下颌骨在负载下不同地变形。结果，当包括PDL时，下颌骨中的菌株显着增加，而尖齿下方的骨中的应变减少。这些结果表明了PDL在FE研究中的重要性。因此，我们建议PDL应包括在咀嚼装置的FE模型中，具有测试结果对PDL材料的杨氏模量的变化来评估结果的敏感性。

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