悬臂式固定局部义齿的三维有限元应力分析

Three-dimensional finite element stress analysis of a cantilever fixed partial denture.

作者信息

Awadalla H A, Azarbal M, Ismail Y H, el-Ibiari W

机构信息

Department of Prosthodontics, University of Pittsburgh, School of Dental Medicine, Pa.

出版信息

J Prosthet Dent. 1992 Aug;68(2):243-8. doi: 10.1016/0022-3913(92)90322-2.

DOI:10.1016/0022-3913(92)90322-2

PMID:1501167

Abstract

A three-dimensional mathematical model was generated, representing a three-unit cantilever fixed partial denture and its supporting mandibular structures. First and second premolars were used as abutments with one posterior cantilever pontic. A 5 lb vertical load was applied to the pontic. Vertical and horizontal stresses were analyzed by means of a three-dimensional finite element stress analysis technique. The results showed that a cantilever pontic creates considerable compressive stress on the abutment nearest to the pontic and produces tensile stress on the abutment farthest from the pontic.

摘要

构建了一个三维数学模型，该模型代表一个三单位悬臂固定局部义齿及其支持的下颌结构。第一和第二前磨牙用作基牙，带有一个后悬臂桥体。在桥体上施加5磅的垂直载荷。采用三维有限元应力分析技术分析垂直和水平应力。结果表明，悬臂桥体在最靠近桥体的基牙上产生相当大的压应力，并在离桥体最远的基牙上产生拉应力。