上海交通大学学报（医学版）

›› 2009, Vol. 29 ›› Issue (11): 1288-.

• 专题报道（口腔修复学） • 上一篇    下一篇

套筒冠与卡环固位型义齿修复末端游离缺失的应力分布比较

魏 斌, 陈 洁, 黄庆丰, 金文忠, 张富强   

  1. 上海交通大学 医学院第九人民医院口腔医学院 口腔修复科 上海市口腔医学重点实验室, 上海 200011
  • 出版日期:2009-11-25 发布日期:2009-11-24
  • 通讯作者: 张富强, 电子信箱: fredzc@online.sh.cn。
  • 作者简介:魏 斌（1969—）, 男, 副主任医师, 博士；电子信箱: weibin0328@hotmail.com。
  • 基金资助:

    “十一五”家科技支撑计划重点项目(2007BAI18B05)；上海市科学技术委员会资助项目(08DZ2271100)；上海市重点学科建设项目(S30206)；上海市重点(特色)学科建设项目(T0202)

Comparison of stress distribution on telescopic denture and clasp-retention denture for the bilateral free-ended case

WEI Bin, CHEN Jie, HUANG Qing-feng, JIN Wen-zhong, ZHANG Fu-qiang   

  1. Department of Prosthodontics, Shanghai Key Laboratory of Stomatology, College of Stomatology, The Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200011, China
  • Online:2009-11-25 Published:2009-11-24
  • Supported by:

    The Eleventh Five Year Plan National Key Science and Technology Project, 2007BAI18B05; Shanghai Science and Technology Committee Foundation, 08DZ2271100; Shanghai Leading Academic Discipline Fund, S30206; Shanghai Leading Academic Discipline Fund, T0202

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摘要：

目的 通过模块化方式建立套筒冠及可摘局部义齿的三维有限元模型，比较三种修复体的应力分布特点。方法 调用正常牙列模型库编辑建立双侧末端游离缺失的牙列模型，在固定义齿模型库及可摘局部义齿模型库基础上，借助DELL Precision图形工作站，利用UG 5.0、HyperMesh 7.0和Abaqus 6.5软件，建立套筒冠义齿及近中支托和远中支托的可摘局部义齿三维有限元模型，进行有限元力学分析和比较。结果 在套筒冠义齿，基牙牙根及牙周膜、牙槽黏膜和牙槽骨的应力分布均匀，其牙根受力最大值（6.205 MPa）明显小于其他两种可摘局部义齿设计（分别为18.41 MPa和34.49 MPa）。结论 采用套筒冠设计修复双侧末端游离缺失病例，具有应力分布均匀，基牙受力较小的优点，有利于基牙及周围组织的健康。

关键词: 有限元分析, 套筒冠义齿, 可摘局部义齿

Abstract:

Objective To establish three dimensional finite element model libraries of telescopic dentures and removable partial dentures by means of model libraries, and compare the characteristics of stress distribution among three prostheses. Methods Normal model libraries were imported and edited, and models of bilateral free-ended cases were established. Based on the model libraries of fixed partial dentures and removable partial dentures, the finite element models of telescopic dentures and removable partial dentures with medial or distal occlusal rest were established using softwares such as DELL Precision Graphics Workstation, UG 5.0, HyperMesh 7.0 and Abaqus 6.5, then finite element stress analysis was performed. Results The stress distribution on abutment root, parodontium, alveolar mucosa and alveolar bone was uniform. The maximum value of stress on the abutment root (6.205 MPa) was much less than those of two removable partial dentures (18.41 MPa and 34.49 MPa). Conclusion For bilateral free-ended cases, the telescopic denture design is uniform in stress distribution with less stress on abutment root, which is healthy to the abutment root and surrounding tissues.

Key words: finite element analysis, telescopic denture, removable partial denture