动态载荷下不同骨质对天然牙-种植体联合修复应力分布的影响

目的利用有限元方法探索下颌后牙区天然牙-种植体联合修复在不同骨质内的应力分布情况,以评定出适宜行联合修复所需的骨质类型。方法采用三维有限元分析法,分别对骨质为Ⅰ、Ⅱ、Ⅲ、Ⅳ类颌骨类型中的天然牙-种植体联合修复体施加动态载荷,并对各界面所承受的Von Mises应力进行分析。结果皮质骨所受最大Von Mises应力值从Ⅰ类骨到Ⅳ类骨逐渐增大,最大等效应力分别为89.229、91.860、125.840、158.420 MPa。松质骨所受最大Von Mises应力值从Ⅰ类骨到Ⅳ类骨均逐渐减小,最大等效应力分别为58.584、43.645、21.688、18.249 MPa。在同一类模型中,松质骨和...

Full description

Saved in:
Bibliographic Details
Published in华西口腔医学杂志 Vol. 33; no. 3; pp. 286 - 290
Main Author 张杨 王超 张晓南 徐凌
Format Journal Article
LanguageChinese
Published 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 401147 2015
Subjects
动态载荷
天然牙-种植体联合修复
有限元分析
骨质
天然牙-种植体联合修复
骨质
tooth implant-supported fixed partial prostheses
有限元分析
dynamic loads
bone quality
finite element analysis
动态载荷
Online AccessGet full text
ISSN1000-1182
DOI10.7518/hxkq.2015.03.015

Cover

More Information
Summary:目的利用有限元方法探索下颌后牙区天然牙-种植体联合修复在不同骨质内的应力分布情况,以评定出适宜行联合修复所需的骨质类型。方法采用三维有限元分析法,分别对骨质为Ⅰ、Ⅱ、Ⅲ、Ⅳ类颌骨类型中的天然牙-种植体联合修复体施加动态载荷,并对各界面所承受的Von Mises应力进行分析。结果皮质骨所受最大Von Mises应力值从Ⅰ类骨到Ⅳ类骨逐渐增大,最大等效应力分别为89.229、91.860、125.840、158.420 MPa。松质骨所受最大Von Mises应力值从Ⅰ类骨到Ⅳ类骨均逐渐减小,最大等效应力分别为58.584、43.645、21.688、18.249 MPa。在同一类模型中,松质骨和皮质骨的最大Von Mises应力值均为舌颊向加载〉颊舌向加载〉垂直向加载。结论骨质的类型对修复体周围骨的应力分布有重要的影响,Ⅰ、Ⅱ类骨较Ⅲ、Ⅳ类骨更适合行种植体-天然牙联合修复。
Bibliography:Zhang Yang, Wang Chao, Zhang Xiaonan, Xu Ling （Dept. of Prosthodontics, Stomatological Hospital of Chongqing Medical University, Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing 401147, China）
51-1169/R
tooth implant-supported fixed partial prostheses;bone quality;dynamic loads;finite element analysis
ObjectiveThis study aims to evaluate the influence of different bone types on the stress distribution in tooth implant-supported fixed partial prostheses by using finite element （FE） analysis. Methods Four FE models of mandibular arch containing one implant splinted to the mandibular second premolar were built according to bone types Ⅰ, Ⅱ, Ⅲ, and Ⅳ. Dy-namic loads of 250 N were applied to the buccal and lingual cusps of the prostheses in different directions to simulate the mas-ticatory cycle. The maximum Von Mises stresses were calculated using the FE analysis software. Results The maximum Von Mises stresses of the cortical bones were 89.229, 91.860, 125.840, and 158.420 MPa, increasin
ISSN:1000-1182
DOI:10.7518/hxkq.2015.03.015