华西口腔医学杂志 ›› 2020, Vol. 38 ›› Issue (5): 537-540.doi: 10.7518/hxkq.2020.05.011

• 临床研究 • 上一篇    下一篇

基台颈部缓冲层对种植体应力分布影响的三维有限元分析

张帅1(), 吕川2, 李进红3, 朱保民4, 王维倩4()   

  1. 1. 浙江中医药大学口腔医学院/附属口腔医院,杭州 310053
    2. 杭州市东宁口腔诊所,杭州 310017
    3. 浙江中医药大学附属广兴医院,杭州 310021
    4. 杭州口腔医院VIP中心,杭州 310002
  • 收稿日期:2019-12-26 修回日期:2020-06-19 出版日期:2020-10-01 发布日期:2020-10-14
  • 通讯作者: 王维倩 E-mail:zhsrenl@163.com;hzwwq@163.com
  • 作者简介:张帅,副主任医师,硕士,E-mail:zhsrenl@163.com

Three-dimensional finite element analysis of the influence of an abutment buffer layer on implant stress distribution

Zhang Shuai1(), Lü Chuan2, Li Jinhong3, Zhu Baomin4, Wang Weiqian4()   

  1. 1. School/Hospital of Stomatology, Zhejiang Chinese Medical University, Hangzhou 310053, China
    2. Hangzhou Dongning Road Dental Clinic, Hangzhou 310017, China
    3. Guangxing Hospital, Zhejiang Chinese Medical University, Hangzhou 310021, China
    4. VIP Center, Hangzhou Dental Hospital, Hangzhou 310002, China
  • Received:2019-12-26 Revised:2020-06-19 Online:2020-10-01 Published:2020-10-14
  • Contact: Wang Weiqian E-mail:zhsrenl@163.com;hzwwq@163.com

摘要: 目的 应用三维有限元法分析动态载荷下基台缓冲层对种植体应力分布的影响。方法 根据CT扫描数据建立种植体在人类下颌骨的三维实体几何模型,在种植体上方分别制作基台无缓冲层和基台有缓冲层的修复体,缓冲部分由高聚合度聚氯乙稀制作。分别对2种修复体施加垂直向载荷200 N、水平向载荷100 N(45°),加载集中于种植体顶部中心。通过三维有限元法分析种植体、中央螺栓、基台的体部和颈部以及下颌骨各部位受到的应力。结果 基台有缓冲层时种植体、中央螺栓、基台的体部和颈部以及下颌骨各部位上受到的应力均明显小于基台无缓冲层时。结论 基台有缓冲层可显著降低种植体、中央螺栓、基台以及下颌骨各部位受到的应力。

关键词: 种植体, 基台, 缓冲层, 应力, 有限元分析

Abstract:

Objective To study the stress distribution under dynamic loading in the presence or absence of an abutment buffer layer by using three-dimensional finite element analysis. Methods A three-dimensional solid geometric model of an implant in a human mandible was established on the basis of CT scan data. A buffer-free abutment prosthesis and a buffer-abutment abutment prosthesis were installed above the implant. The buffer layer was made of high-density polyethylene. A vertical load of 200 N and a horizontal load of 100 N (45°) were concentrated on the centers of the implant restorations of the two groups. Stresses on the implant neck and body, abutment neck and body, central bolt neck and body, and bone interface were compared via three-dimensional finite element analysis. Results Stresses on the implant neck and body, abutment neck and body, central bolt neck and body, and bone interface on the abutment with a buffer layer were significantly lower than those on the abutment without a buffer layer. Conclusion The increase in the buffer layer of the abutment neck significantly reduced stress on the implant neck, abutment, central bolt neck, and bone interface.

Key words: implant, abutment, buffer layer, stress, finite element analysis

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