Romeed Shihab A, Fok Siu L, Wilson Nairn H
Dept. Oral Surgery, St. John's Hospital, Wood St., Chelmsford, Essex CM2 9BG, UK.
Eur J Prosthodont Restor Dent. 2004 Mar;12(1):21-7.
In the present study two-dimensional finite element models of two- and three-unit cantilever fixed partial dentures were created to simulate the replacement of a maxillary second premolar in a shortened dental arch. The purpose of the study was to investigate the mechanical behaviour of the two designs of fixed partial denture using the finite element method. The results indicate that the mechanical behaviour of the three-unit fixed partial denture was more favourable than that of the two-unit fixed partial denture under similar conditions of occlusal loading. Prosthesis displacement and maximum principal stresses increased substantially when loading was limited to the pontic, in particular, in the model of two-unit fixed partial denture.
在本研究中，创建了两单位和三单位悬臂固定局部义齿的二维有限元模型，以模拟短牙弓中上颌第二前磨牙的替换。本研究的目的是使用有限元方法研究两种固定局部义齿设计的力学行为。结果表明，在相似的咬合加载条件下，三单位固定局部义齿的力学行为比两单位固定局部义齿更有利。当载荷仅限于桥体时，特别是在两单位固定局部义齿模型中，假体位移和最大主应力显著增加。
