Effect of Bone Remodeling on Dental Implant Fatigue Limit Predicted Using 3D Finite Element Analysis.
Effect of Bone Remodeling on Dental Implant Fatigue Limit Predicted Using 3D Finite Element Analysis.
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DOI：
10.54289/jdoe2200102
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Griggs, Jason A
中科院分区：
文献类型：
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作者：
Satpathy, Megha;Duan, Yuanyuan;Betts, Logan;Priddy, Matthew;Griggs, Jason A
采用有限元分析（FEA）评价直径减小的牙种植体周围骨重建对其疲劳极限的影响。使用微型计算机断层扫描（Skyscan 1172）扫描牙科种植体组件，包括直径减小的牙科种植体（Biomet-3 i外六角）、基台（GingiHue®）和连接器螺钉（Gold-Tite Square螺钉）。使用Mimics（Materialise）和光学显微镜（Keyence）测量其尺寸。使用SOLIDWORKS（Dassault Systems）构建物理样本的数字复制品。在SOLIDWORKS中设计了具有两层（皮质骨和松质骨）的圆柱形骨样本保持器。创建了两个程序集：（a）模式1：有未重塑的骨骼;（B）模型2：植入物螺纹附近区域的松质骨重塑。在ABAQUS（SIMULIA）中进行FEA。在模型1中，皮质骨和松质骨的杨氏模量分别为20 GPa和14 GPa。对于模型2，邻近种植体螺纹的松质骨区域的杨氏模量为20 GPa。使用fe-safe（SIMULIA）估计疲劳极限。100 N载荷下，型号1和2的最大von Mises应力均为439.9 MPa，位于连接器螺钉处。型号1和2的疲劳极限均为116.4 N。结果表明，根据ISO 14801测试的植入物抗疲劳性可以准确预测，而无需模拟临床病例中骨-植入物界面处发生的非均匀刚度。
To evaluate the effect of bone remodelling around a reduced-diameter dental implant on its fatigue limit using finite element analysis (FEA). A dental implant assembly, which included a reduced-diameter dental implant (Biomet-3i external hex), an abutment (GingiHue®) and a connector screw (Gold-Tite Square screw), was scanned using micro-computed tomography (Skyscan 1172). Its dimensions were measured using Mimics (Materialise) and an optical microscope (Keyence). The digital replicas of the physical specimens were constructed using SOLIDWORKS (Dassault Systems). A cylindrical bone specimen holder with two layers (cortical and cancellous bone) was designed in SOLIDWORKS. Two assemblies were created: (a) Model 1: Having non-remodelled bone; (b) Model 2: Cancellous bone remodelled at the regions adjacent to the implant screw threads. FEA was performed in ABAQUS (SIMULIA). In Model 1, the Young’s modulus of cortical and cancellous bone were 20 GPa and 14 GPa, respectively. For Model 2, the region of the cancellous bone adjacent to the implant screw threads was assigned a Young’s modulus of 20 GPa. fe-safe (SIMULIA) was used to estimate the fatigue limit. The maximum von Mises stress under 100 N load was 439.9 MPa for both models 1 and 2 and was located at the connector screw. The fatigue limit was 116.4 N for both models 1 and 2. The results suggest that implant fatigue resistance tested according to ISO 14801 may be accurately predicted without bothering to simulate the non-homogeneous stiffness that occurs at the bone-implant interface in the clinical case.