华西口腔医学杂志

• 基础研究 • 上一篇    下一篇

Replace内、外连接方式种植体-基台内部的应力分析

兰晶1 徐欣1 姜广水1 管延锦2 黄海云1 梁晋1 马晓妮1   

  1. 1.山东大学口腔医院种植中心, 山东省口腔生物医学重点实验室;2.山东大学材料科学与工程学院, 济南250012
  • 收稿日期:2011-10-25 修回日期:2011-10-25 出版日期:2011-10-20 发布日期:2011-10-20
  • 通讯作者: 徐欣,Tel:0531-88382636
  • 作者简介:兰晶(1971—),女,河北人,副教授,硕士
  • 基金资助:

    国家“十五”科技攻关计划基金资助项目(2004BA720A-27)

Three-dimension finite element analyses of interior stress of two kinds of Replace implant

Lan Jing1, Xu Xin1, Jiang Guangshui1, Guan Yanjin2, Huang Haiyun1, Liang Jin1, Ma Xiaoni1   

  1. 1. Implantation Center, School of Stomatology, Shandong University, Shandong Provincial Key Laboratory of Oral Biomedicine, Jinan 250012, China; 2. School of Materials Science and Engineering, Shandong University, Jinan 250012, China
  • Received:2011-10-25 Revised:2011-10-25 Online:2011-10-20 Published:2011-10-20
  • Contact: Xu Xin,Tel:0531-88382636

摘要:

目的建立2种Replace实体种植体的下颌骨三维有限元模型,研究Replace内、外连接方式种植体-基台内部的应力状态。方法测量2种种植体各部件的数据和利用螺旋CT扫描下颌骨截面形态,分别建立2种种植体的三维骨内模型,对模型采用轴向加载(200 N)、30°侧向加载(100 N),分析2种种植体-基台内部的应力分布趋势。结果无论轴向加载还是侧向加载,2种种植体的应力主要集中在种植体颈部狭窄处,且侧向加载时的应力值均高于轴向加载。Replace Select种植体内部的应力值均高于Replace External Hex种植体。结论临床修复时应避免种植体受到过大的力,尤其是侧向力,以防出现种植体破坏现象,使用Replace Select种植体时更应注意。

关键词: 牙种植体, 基台, 有限元分析

Abstract:

Objective To establish three-dimension finite element model of mandible with two kinds of Replace implant, and to study stress of implant and abutment. Methods The data of components of the dental implant was measured, cross section of the mandible was scanned by spiral CT and image reconstruction technique was conducted. Threedimension finite element analysis software UG and MSC. Marc/Mentat were used to built the conjunction model and bone model of two implant systems. Axial loading(200 N) and 30° oblique loading(100 N)were applied on the models respectively, the stress distribution patterns of the implant and abutment of two implant systems were analyzed. Results The peak stress district was concentrated on the structure of the implant cervix, which was more obviously displayed on the Replace Select implant. The peak stress of oblique loading was higher than that of axial loading. The peak stress on the implant cervix of Replace Select implant was higher than that of Replace External Hex implant in all loadings. Conclusion To Replace Select especially, oblique force should be avoided on clinical practice in case of the implant fracture.

Key words: dental implant, abutment, finite element analysis