中国组织工程研究

中国组织工程研究 ›› 2011, Vol. 15 ›› Issue (52): 9742-9745.doi: 10.3969/j.issn.1673-8225.2011.52.012

• 数字化骨科 digital orthopedics • 上一篇    下一篇

两种直径种植体对上颌窦黏膜形变影响的有限元分析

刘晓芳1，胡玲玲2，宋光保1，侯雅蓉1，柳大烈3，章锦才1   

  1. 1南方医科大学附属口腔医院·广东省口腔医院，广东省广州市510280
    2中山大学工学院应用力学与工程系，广东省广州市510275
    3南方医科大学附属珠江医院整形美容外科，广东省广州市510280
  • 收稿日期:2011-10-09 修回日期:2011-10-26 出版日期:2011-12-24 发布日期:2011-12-24
  • 通讯作者: 章锦才，教授，博士生导师，南方医科大学附属口腔医院·广东省口腔医院，广东省广州市510280 jincaizhang@hotmail.com 并列通讯作者：柳大烈，教授，博士生导师，南方医科大学附属珠江医院整形美容外科，广东省广州市510280 liudalie@hotmail.com
  • 作者简介:刘晓芳，女，汉族，主任医师，主要从事口腔生物力学的研究。 liuxiaofang900@hotmail.com
  • 基金资助:

    广东省医学科研课题资助(A2009095)，课题名称：骨挤压式上颌窦提升术的计算机力学分析研究。

Effect of two different diameter implants on deformation of maxillary sinus mucosa: A three-dimensional finite element analysis

Liu Xiao-fang1, Hu Ling-ling2, Song Guang-bao1, Hou Ya-rong1, Liu Da-lie3, Zhang Jin-cai1   

  1. 1Department of Prosthodontics, Affiliated Stomatological Hospital of Southern Medical University, Guangdong Provincial Stomatological Hospital , Guangzhou  510280, Guangdong Province, China
    2Department of Applied Mechanics and Engineering, Engineering School of Sun Yat-sen University, Guangzhou  510275, Guangdong Province, China
    3Department of Plastic and Aesthetic Surgery, Affiliated Zhujiang Hospital of Southern Medical University, Guangzhou  510280, Guangdong Province, China
  • Received:2011-10-09 Revised:2011-10-26 Online:2011-12-24 Published:2011-12-24
  • Contact: Zhang Jin-aci, Professor, Doctoral supervisor, Department of Prosthodontics, Affiliated Stomatological Hospital of Southern Medical University, Guangdong Provincial Stomatological Hospital , Guangzhou 510280, Guangdong Province, China jincaizhang@hotmail.com Correspondence to: Liu Da-lie, Professor, Doctoral supervisor, Department of Plastic and Aesthetic Surgery, Affiliated Zhujiang Hospital of Southern Medical University, Guangzhou 510280, Guangdong Province, China liudalie@hotmail.com
  • About author:Liu Xiao-fang, Chief physician, Department of Prosthodontics, Affiliated Stomatological Hospital of Southern Medical University, Guangdong Provincial Stomatological Hospital , Guangzhou 510280, Guangdong Province, China
  • Supported by:

    Guangdong Province Medical Research Project Foundation, No. A2009095*

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摘要：

背景：上颌窦黏膜形变温和均匀是减少骨挤压式上颌窦提升手术中黏膜穿孔的重要因素。
目的：比较两种直径种植体对上颌窦黏膜形变的影响。
方法：在ANSYS有限元软件的特定单元中分别建立直径4.1 mm和4.8 mm的ITI种植体与厚0.3 mm的上颌窦黏膜的有限元模型，模拟上颌窦提升手术抬高黏膜，根据大变形理论计算不同提升高度黏膜表面Von mises应力值。
结果与结论：结果显示，最大Von mise应力发生在黏膜中心，最小Von mise应力发生在黏膜边缘。两种直径种植体对黏膜中心作用力差异无显著性意义(P > 0.05)，而对黏膜边缘作用力，直径4.8 mm种植体较4.1 mm种植体具有更加均匀温和的作用力。因此，在骨宽度允许的情况下，直径4.8 mm的种植体更适合用于骨挤压式上颌窦提升手术。

关键词: 牙种植体, 上颌窦黏膜, 不同直径, Von mise应力, 有限元分析

Abstract:

BACKGROUND: Mild and uniform deformation of maxillary sinus mucosa is an important factor that reduces the incidence of mucosal perforation during maxillary sinus elevation by using bone condensing technology.
OBJECTIVE: To compare the effects of two diameter implants on the deformation of maxillary sinus mucosa.
METHODS: Three-dimensional finite element models of the maxillary sinus mucosa (thickness 0.3 mm) with two diameter implants (4.1 mm, 4.8 mm) were established in the special unit of ANSYS software. Maxillary sinus elevation operation was simulated. Von Mises stress values of mucosa surface with different lifting height was calculated according to the finite deformation theory.
RESULTS AND CONCLUSION: The maximum stresses of all models existed in the center of the mucosa and the minimum stresses existed in the edge of the mucosa. There was no significant difference in the stress to the center of the mucosa between the two diameter implants (P > 0.05), but the stress in the edge of mucosa of the larger diameter implant (4.8 mm) was significantly less than that of the stress in the edge of the small diameter implant (4.1 mm). The larger diameter implant (4.8 mm) has less stress for augmentation of the maxillary sinus floor in the case of allowed width.

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