Research and Education Institute - Hospital Sírio Libanes, DASA/Leforte Group, São Paulo State University Araraquara - UNESP, São Paulo Metodista University, São Paulo, Brazil.
Research and Education Institute, Hospital Sírio Libanes; São Paulo State University Araçatuba; DASA/Leforte Group, São Paulo Metodista University, Praça Francisco Manuel, 72, São Paulo, 01541-020, Brazil.
Oral Maxillofac Surg. 2024 Jun;28(2):595-603. doi: 10.1007/s10006-023-01173-3. Epub 2023 Jul 29.
This study aimed to compare the reconstruction with type 2.4 and three-dimensional (3D) grid plates relating the areas of weakness to anatomical regions of force incidence in atrophic mandibles with and without segmentation using finite element analysis (FEA).
Strength and force quality in the mandible were also determined. The atrophic mandible models with and without segmentation were divided into four groups, and the behavior of each plate was analyzed using finite element analysis. In the atrophic mandible without segmentation using the type 2.4 reconstruction plate, the highest stress concentration in the plate was observed in the posterior region of the mandibular body and in the grid type 3D reconstruction plate was observed in the mandibular angle.
In the segmented atrophic mandible with the 2.4 reconstruction plate, higher stress concentration was observed in the mandibular segment defect. Analysis of the 3D grid-like reconstruction plate revealed that the geometry of the plate conferred greater stiffness to the assembly, as the most significant stress concentration was observed at the mandibular angle.
The width of the plate design may influence the strength, not the thickness.
本研究旨在通过有限元分析（FEA）比较 2.4 型和三维（3D）网格板在有和无分割的情况下，与萎缩下颌骨的力作用解剖区域相关的薄弱区域的重建，以评估其效果。
还确定了下颌骨的强度和力质量。将有和无分割的萎缩下颌骨模型分为四组，并使用有限元分析分析了每个板的行为。在无分割的使用 2.4 型重建板的萎缩下颌骨中，观察到板的后下颌体区域和网格 3D 重建板的下颌角区域的最高应力集中。
在使用 2.4 型重建板的分割性萎缩下颌骨中，下颌骨节段缺损处观察到更高的应力集中。对 3D 网格状重建板的分析表明，板的几何形状赋予了组件更大的刚度，因为在下颌角处观察到最大的应力集中。
板的设计宽度可能会影响强度，而不是厚度。
