摘要
目的:建立含四颗种植体的无牙下颌骨三维有限元模型并对种植体不同位置组合进行应力加载,模拟不同位置套筒冠附着体固位的下颌种植覆盖义齿受力情况,对种植体位置进行优化设计。方法:应用CATIA建模软件以及ABAQUS有限元软件建立含4颗对称分布的标准ITI种植体(4.1×10mm)的有限元模型。根据种植体位置不同共建立了I-VII个模型,并在模拟的义齿基托平面结构上进行垂直方向100N静态颌力加载。结果:种植体周围骨质应力分布情况显示:3-6设计有良好的应力分布情况,2-4设计和3-5设计次之,其余模型的应力分布显示出了不均衡性。结论:采用磨牙区种植的设计值得考虑,对于3-6设计而言,各个种植体周围的应力分布更为均衡合理。同时在位置设计中注意控制种植体间的距离。
Objective:To establish three dimensional finite element model of edentulous mandible in which four implants were inserted,and the stresses loading for different location combined designs of four implants were carried out,which to simulate the stresses distribution of mandibular implant overdentures that were retained by different locations telescopic crown attachments.Thereby the optimum designs were determined concerning of telescopic crowns retentive location.Methods:The modeling software of CATIA and 3-D finite element software of ABAQUS were used to build finite element mandible models in which four standard ITI implants(4.1×10mm)were inserted.According to different implant locations,I-VII models were established.These models were loaded with 100N vertical and static loading on the simulated denture base plate.Results:The result of stress distribution around implants showed:the model of 3-6 design showed better stress distribution,the models of 2-4design and 3-5design were secondary.For the rest models,stress distribution seemed to be malconformation.Conclusion:The designs that inserting implants in the molar areas should be considered,especially for the 3-6 design.Because the stress distribution seemed to be more balanced and reasonable in 3-6 design,at the same time,the distance between mesial and distal implants should be concerned.
出处
《中国口腔种植学杂志》
2009年第2期98-99,共2页
Chinese Journal of Oral Implantology
关键词
套筒冠
种植体
覆盖义齿
无牙下颌骨
有限元模型
Telescopic Crown
Dental Implant
Implant Overdenture
Edentulous Mandible
Finite element model
