口腔医学研究

口腔医学研究 ›› 2019, Vol. 35 ›› Issue (7): 671-675.DOI: 10.13701/j.cnki.kqyxyj.2019.07.013

• 口腔种植修复学研究 • 上一篇    下一篇

基于三维有限元评价种植体不同倾斜角度在上颌后牙区骨量不足的应力分析

李希光1,2, 郅克谦2, 高岭2, 张博2, 周民战2, 肖林京1*   

  1. 1. 山东科技大学机械电子工程学院 山东 青岛 266590;
    2. 青岛大学附属医院西海岸院区口腔颌面外科/种植科 山东 青岛 266555
  • 收稿日期:2018-10-31 出版日期:2019-07-25 发布日期:2019-07-24
  • 通讯作者: 肖林京,E-mail:xiaolj2008@126.com
  • 作者简介:李希光(1994~),男,山东东营人,汉,硕士在读,主要从事细胞力学及骨组织工程方面的研究
  • 基金资助:
    国家自然科学基金(编号:81472520、81502354)

Stress Analysis of Different Implant Tilt Angles in Insufficient Bone Mass in Maxillary Posterior Region Based on Three Dimensional Finite Element Analysis

LI Xiguang1,2, ZHI Keqian2,GAO Ling2,ZHANG Bo2,ZHOU Minzhan2,XIAO Linjing1*   

  1. 1. College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China;
    2. The Affiliated Hospital of Qingdao University of West Coast District, Qingdao 266555, China.
  • Received:2018-10-31 Online:2019-07-25 Published:2019-07-24

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摘要： 目的:研究采用三维有限元分析手段评价在上颌后牙区骨量不足情况下不同的骨质类型下种植体植入角度的改变对周围骨组织的应力分析。方法:使用SolidWorks 2015软件建立上颌骨、种植体、基台、牙冠模型。将上颌骨模型定义为D2、D3 两类骨质类型,每种类型的上颌骨按种植体植入的角度分为垂直种植、30°倾斜种植、45°倾斜种植三类,其中垂直种植时为模拟上颌窦底提升在上颌骨模型下建立人工骨块。建立装配体,在其顶部施加一个与冠中央呈45°角、大小为150 N的力,分析周围骨组织的应力分布。结果:D3类骨质模型中的应力高于D2类骨质模型。在皮质骨中,垂直种植模型中的应力最小,其次是45°倾斜模型,30°倾斜模型中的应力最大。结论:在骨量不足的上颌后牙区,倾斜种植对周围骨组织的应力要高于垂直种植,采取上颌窦底提升术与种植体垂直植入术为首选治疗方案;对于倾斜种植,采取45°种植体植入角度比30°更具优势

关键词: 骨量不足, 倾斜种植体, 骨质类型, 上颌窦底提升, 三维有限元分析

Abstract: Objective: To evaluate the stress analysis of the surrounding bone tissue caused by the change of implant angle under different bone types in the case of insufficient bone mass in the maxillary posterior region by using three dimensional finite element analysis. Methods: SolidWorks 2015 software was used to establish the models of maxillary, implant, abutment, and dental crown. The maxillary model was defined as two bone types, D2 and D3. Each type of maxillary was classified into three categories according to the angle of implant placement, including vertical implant, 30 degree tilted implant, and 45 degree tilted implant. In the vertical implant, artificial bones were built under the maxillary model to simulate sinus floor elevation. The assembly was established, a force of 150N was applied at the top of the dental crown, with an angle of 45 degrees to the center. The stress distribution of surrounding bone tissue was analyzed. Results: The stress in D3 bone model was higher than that in D2 bone model. In the cortical bone, the stress in the vertical implant model was the minimum, followed by the 45 degree tilted model, and the maximum stress was in the 30 degree tilted model. Conclusion: In the maxillary posterior region with insufficient bone mass, the stress of tilted implant on surrounding bone tissue was higher than that of vertical implant. Sinus floor elevation and implant vertical implantation surgery was the preferred treatment. The 45 degree tilted implant was more advantageous than 30 degree one when tilted implant was undertaken

Key words: insufficient bone mass, tilted implant, bone type , sinus floor elevation, three dimensional, finite element analysis