PDF(Pubmed)
Abstract：
UNASSIGNED: To evaluate the effect of bone remodelling around a reduced-diameter dental implant on its fatigue limit using finite element analysis (FEA).
UNASSIGNED: 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.
UNASSIGNED: 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.
UNASSIGNED: 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.
UNASSIGNED: 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.
UNASSIGNED: 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.
UNASSIGNED: 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.
摘要：
UNASSIGNED：使用有限元分析（FEA）评估直径减小的牙科植入物周围的骨骼重塑对其疲劳极限的影响。
UNASSIGNED：牙科植入物组件，其中包括直径减小的牙科植入物（Biomet-3i外部六角），基台(GingiHue®)和连接螺钉(Gold-Tite方形螺钉),使用微型计算机断层扫描（Skyscan1172）进行扫描。使用Mimics(Materialise)和光学显微镜(Keyence)测量其尺寸。使用SOLIDWORKS（达索系统）构建物理样本的数字副本。在SOLIDWORKS中设计了两层（皮质骨和松质骨）的圆柱形骨标本支架。创建了两个组件:(a)模型1:具有未重塑的骨;(b)模型2:在邻近植入物螺纹的区域处重塑的松质骨。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20GPa和14GPa，分别。对于模型2,邻近植入物螺纹的松质骨区域被指定为20GPa的杨氏模量。Fe-safe(SIMULIA)用于估计疲劳极限。
UNASSIGNED：型号1和2在100N载荷下的最大vonMises应力均为439.9MPa，位于连接器螺钉处。模型1和模型2的疲劳极限均为116.4N。
UNASSIGNED：结果表明，可以准确预测根据ISO14801测试的植入物抗疲劳性，而不必费心模拟临床情况下在骨-植入物界面处发生的非均匀刚度。
UNASSIGNED：牙科植入物组件，
UNASSIGNED：型号1和2在100N载荷下的最大vonMises应力均为439.9MPa，位于连接器螺钉处。
UNASSIGNED：结果表明，可以准确预测根据ISO14801测试的植入物抗疲劳性，而不必费心模拟临床情况下在骨-植入物界面处发生的非均匀刚度。
