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Abstract：
Mandibular reconstructive surgery is necessary for large bone defects. Although various reconstruction methods have been performed clinically, there is no mandibular reconstruction method that meets both sufficient strength criteria and the patient\'s specific morphology. In this study, the material strength of the cylindrical lattice structures formed by electron-beam melting additive manufacturing using titanium alloy powder was investigated for mandibular reconstruction. The virtual strengths of 28 lattice structures were compared using numerical material tests with finite element method software. Subsequently, to compare the material properties of the selected structures from the preliminary tests, compression test, static bending test and fatigue test were conducted. The results showed that there were correlations with relative density and significant differences among the various structures when comparing internal stress with deformation, although there was a possibility of localized stress concentration and non-uniform stress distribution based on the lattice structure characteristics. These results suggest that the lattice structure of body diagonals with nodes and a cell size of 3.0 mm is a potential candidate for metallic artificial mandibles in mandibular reconstruction surgery.
摘要：
下颌骨重建手术对于较大的骨缺损是必要的。尽管临床上已经进行了各种重建方法，下颌骨重建方法既满足足够的强度标准，也满足患者的特定形态。在这项研究中,研究了使用钛合金粉末通过电子束熔化增材制造形成的圆柱晶格结构的材料强度，以进行下颌骨重建。使用有限元软件进行数值材料测试，比较了28个晶格结构的虚拟强度。随后，从初步测试中比较选定结构的材料特性，压缩试验,进行了静态弯曲试验和疲劳试验。结果表明，当比较内应力与变形时，各种结构之间存在相对密度的相关性和显着差异。尽管基于晶格结构特征存在局部应力集中和不均匀应力分布的可能性。这些结果表明，具有节点和细胞大小为3.0mm的身体对角线的晶格结构是下颌骨重建手术中金属人造下颌骨的潜在候选者。
