Alveolar bone atrophy can directly cause a decrease in bone level. The effect of this process on the service life of dental implants is unknown. The aim of this study was to determine the failure forms of the two-piece dental implants in the descending process of alveolar bone level, and the specific states of the components during the failure process. The CAD software SolidWorks was used to establish the model of alveolar bone and dental implants in this article. The finite element analysis was used to analyze the statics of the dental implants in the host oral model. The finite element analysis results showed that the stress concentration point of the implant and abutment in the implant system has changed greatly during the descending process of alveolar bone level, and indirectly increased the fatigue life of the same fatigue risk point. At the same time, the dental implants were tested in vitro in the descending process of alveolar bone level. Then, the fracture of the implant system was scanned by scanning electron microscope. The fatigue test results proved the finite element analysis hypothesis the central screw first fractured under fatigue and then caused an overload break of the implant and abutment.

中文翻译：

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牙槽骨水平下降过程中种植牙的静力学和疲劳分析研究。

牙槽骨萎缩可直接导致骨水平降低。该过程对牙科植入物使用寿命的影响尚不清楚。这项研究的目的是确定两件式牙科植入物在牙槽骨水平下降过程中的破坏形式，以及在破坏过程中组件的具体状态。本文使用CAD软件SolidWorks建立了牙槽骨和牙齿植入物的模型。有限元分析被用来分析宿主口腔模型中牙种植体的静力学。有限元分析结果表明，在牙槽骨水平下降过程中，种植体和基台的应力集中点发生了很大变化，间接增加了相同疲劳风险点的疲劳寿命。同时，在牙槽骨水平下降的过程中对牙齿植入物进行了体外测试。然后，通过扫描电子显微镜对植入物系统的骨折进行扫描。疲劳测试结果证明了有限元分析假设，即中心螺钉首先在疲劳下断裂，然后导致种植体和基台过载断裂。