Graillon Nicolas, Foletti Jean-Marc, Godio-Raboutet Yves, Guyot Laurent, Varazzani Andrea, Thollon Lionel
Laboratoire de Bioméchanique Appliquée (LBA), Gustave Eiffel University/Aix-Marseille University, 13015 Marseille, France.
Department of Oral and Maxillofacial Surgery/Assistance Publique-Hopitaux de Marseille (APHM), Conception University Hospital, 13005 Marseille, France.
Bioengineering (Basel). 2023 Aug 22;10(9):994. doi: 10.3390/bioengineering10090994.
Our study aimed to compare the biomechanical behaviour of mandibles with or without titanium miniplates when subjected to an impact after bone healing using a finite element model (FEM) of the human mandible. We simulated mandibular trauma on an FEM of a human mandible carrying or not two parasymphyseal miniplates and applying a concentrated force of 2000 N to four different areas, including the insertion area, the area straddling the edge of the miniplates and the adjacent bone, at a distance from the miniplates on the symphysis, and on the basilar border of the mandible below the miniplates. Then, we compared the Von Mises stress distributions between the two models. In the case of an impact on the miniplates, the maximum Von Mises stress occurred in two specific areas, on the cortical bone at the posterior border of the two miniplates at a distance from the impact, while in the model without miniplates, the Von Mises stresses were homogenously distributed in the impact area. The presence of titanium miniplates in the case of trauma affects the biomechanical behaviour of the mandible and could cause more complex fractures. We recommend informing patients of this potential risk.
我们的研究旨在使用人类下颌骨的有限元模型（FEM），比较骨愈合后遭受撞击时，有或没有钛微型钢板的下颌骨的生物力学行为。我们在带有或不带有两块下颌骨旁正中微型钢板的人类下颌骨有限元模型上模拟下颌骨创伤，并在四个不同区域施加2000 N的集中力，这些区域包括植入区域、横跨微型钢板边缘和相邻骨的区域、距下颌联合处微型钢板一定距离处，以及微型钢板下方下颌骨的基底边缘处。然后，我们比较了两个模型之间的冯·米塞斯应力分布。在撞击微型钢板的情况下，最大冯·米塞斯应力出现在两个特定区域，即距撞击点一定距离处两块微型钢板后缘的皮质骨上，而在没有微型钢板的模型中，冯·米塞斯应力在撞击区域均匀分布。创伤情况下钛微型钢板的存在会影响下颌骨的生物力学行为，并可能导致更复杂的骨折。我们建议告知患者这种潜在风险。
