[1]冯海楠,廖立凡,常晓峰,等. 在不对称无牙下颌骨中进行种植固定修复的三维有限元分析[J].中国美容医学,2019,(10):121-123.
　FENG Hai-nan,LIAO Li-fan,CHANG Xiao-feng,et al. Finite-element Analysis of All-on-4 Prostheses in Asymmetric Edentulous Mandibular[J].Medical Aesthetics and Beauty,2019,(10):121-123.
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 在不对称无牙下颌骨中进行种植固定修复的三维有限元分析
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《中国美容医学》[ISSN:1008-6445/CN:61-1347/R]

卷:
期数:
2019年10期
页码:
121-123
栏目:
出版日期:
2019-10-05

文章信息/Info

Title:
 Finite-element Analysis of All-on-4 Prostheses in Asymmetric Edentulous Mandibular
文章编号:
1008-6455(2019)10-0121-03
作者:
 冯海楠1; 2; 廖立凡1; 2; 常晓峰1; 2; 杜良智1; 2; 赵宁波1; 2; 贺龙龙1; 2
Author(s):
 FENG Hai-nan1; 2;  LIAO Li-fan1; 2;  CHANG Xiao-feng1; 2;  DU Liang-zhi1; 2;  ZHAO Ning-bo1; 2;  HE Long-long1; 2
关键词:
 ; [关键词]无牙颌; 种植修复; 有限元分析; 下颌骨; 截骨
Keywords:
 ; Key words: edentulous; implant restoration; finite-element analysis; mandibular;  osteotomy
分类号:
R782.12
文献标志码:
A
摘要:
[摘要]目的：在下颌骨两侧骨高度严重不对称时进行全口种植固定修复，使用三维有限元技术对修复体支架及种植体的受力
进行分析。方法：虚拟下颌骨模型资料来源于临床患者的CBCT资料，计划通过All-on-4种植技术修复无牙颌。实验组为一侧
牙槽突切除后进行种植修复；对照A组为双侧牙槽突切除后种植修复；对照B组为牙槽突无明显缺损时进行种植固定修复。在
指定区域单侧加载150N、双侧各加载150N垂直力量模拟单侧和双侧咬合力，观察修复体、种植体周围以及牙槽骨周围的Von
Mises应力集中情况。结果：在牙槽骨切除区域的种植体周围会产生更多的Von Mises应力集中；种植体周围骨质和修复桥架
的Von Mises应力要远小于种植体周围的应力。结论：种植固定修复后，种植体承受了主要的咬合应力，因牙槽骨高度缺损
的增加会造成种植体及周围骨组织的Von Mises应力增加，所以应当尽可能保留牙槽骨的高度。

Abstract:
Abstract: Objective The purpose of this study was to evaluate the load transmission to the peri-implant bone under a framework
supported by 4 implants placed in an edentulous mandible and to compare the stress distribution in an asymmetric mandibular
alveolar bone model and controlled symmetric mandibular alveolar bone models via a 3-dimensional finite element analysis.
Methods Computerized models of the mandible with a 4-implant-supported bridge following the All-on-4 concept were
developed based on patient’s CBCT. The study mandible model was designed with an asymmetric alveolar bone to simulate
partial mandibulectomy, and the control mandible models A and B were designed with a flat alveolar bone with different bone
resorption.A 150N load was applied to each side of the prostheses, and the von Mises stress was analyzed along the implants,
framework and bone. Results More stress concertation would happen in models that implant’s surrounding bone was resorbed
or resected, whether in asymmetric alveolar bone or fully resorbed alveolar bone; implant with better bone height would suffer
more stress concertation in asymmetric alveolar bone model compared in symmetric alveolar bone model with better bone
height. However, the stress on the bone surrounding the implant was lower in all mandible models, and the stress concentrated
on the superstructure was low either. Conclusion Based on this research, the All-on-4 plan is feasible for asymmetrical
mandibles.Dentist should maintain bone height and width when possible.

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更新日期/Last Update: 2019-11-07