球帽与Locator式下无牙颌4种植体覆盖义齿的三维有限元分析

发布时间：2018-06-14 00:18

本文选题：下无牙颌 + 种植体　；参考：《重庆医科大学学报》2017年09期

【摘要】：目的:通过建立4种植体支持的下无牙颌覆盖义齿的三维有限元模型,分析不同受力方式下Locator与球帽2种连接方式对下颌骨、种植体及基台应力分布的影响。方法:采集下无牙颌患者的锥形束CT(cone beam computerized tomography,CBCT)数据,应用Mimics、Gomagic Studio、SolidWorks软件分别建立Locator与球帽2种连接方式种植覆盖义齿的三维有限元模型,结合ANSYS软件分析其在不同受力方式下颌骨、种植体及基台的应力分布情况。结果:(1)不同受力方式下,2种连接方式中种植体颈部周围及下颌骨正中舌侧下缘区皮质骨出现应力集中,而最大等效应力(von-Mises应力)位于颌骨正中舌侧下缘皮质骨区;(2)种植体的von-Mises应力集中在种植体颈部及其与附着体基台连接部;(3)同种受力方式下,Locator连接的以上应力集中区的应力均小于球帽连接。结论:(1)4种植体覆盖义齿的最大von-Mises应力位于下颌骨正中舌侧下缘区皮质骨,而非种植体颈部周围皮质骨;(2)Locator连接较球帽连接的种植覆盖义齿的von-Mises更小,更有利于牙槽骨的生理健康和种植体的长期存留。
[Abstract]:Objective: to establish a three-dimensional finite element model of 4 implant-supported subdenture overdentures, and to analyze the effect of locator and ball cap on the stress distribution of mandible, implant and abutment under different loading modes. Methods: the data of conical cone beam computerized tomphography were collected from patients with edentulous jaw. The 3D finite element models of implant-overdenture were established by using Mimicsl Gomagic Studio SolidWorks software. The mandible was analyzed under different loading modes by using ANSYS software. Stress distribution of implants and abutments. Results (1) stress concentration was observed in the cortical bone around the neck of the implant and in the lower margin of the median lingual side of the mandible under different stress modes. The von-Mises stress of the implant located in the cortical bone region of the middle lingual side of the maxilla is concentrated in the neck of the implant and its connection with the attachment base. The stress of the zone is less than that of the ball cap connection. Conclusion the maximum von-Mises stress of the implant overdenture is located in the cortical bone of the lower margin of the median lingual side of the mandible, and the von-Mises of the implant-overdenture is smaller than that of the implant-overdenture with the bone-cap connection, but not the cortical bone around the neck of the implant. It is more beneficial to the physiological health of alveolar bone and the long-term retention of implants.
【作者单位】：重庆医科大学附属口腔医院修复科口腔疾病与生物医学重庆市重点实验室重庆市高校市级口腔生物医学工程重点实验室;
【基金】：国家青年科学基金资助项目(编号:81400572) 重庆市医学科研计划资助项目(编号:20142051) 重庆市基础与前沿研究计划资助项目(编号:cs2015jcyjA10027) 2016年重庆高校创新团队建设计划资助项目重庆市卫生局医学科研计划资助项目(编号:2013-2-071)
【分类号】：R783.6

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