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首页> 外文期刊>The International journal of oral & maxillofacial implants >The effect of prosthesis length and implant diameter on the stress distribution in tooth-implant-supported prostheses: a finite element analysis.
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The effect of prosthesis length and implant diameter on the stress distribution in tooth-implant-supported prostheses: a finite element analysis.

机译：假牙长度和假牙直径对假牙支撑假牙应力分布的影响：有限元分析。

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摘要

The goal of this study was to compare the stress distribution of tooth-implant-supported prostheses (TISPs) and solely implant-supported prostheses (ISPs) with two different pontic spans (three units versus four units).Two-dimensional finite element models were constructed from the radiographs of polyester resin casts to mimic TISPs and ISPs. In all, eight models were analyzed. Occlusal loads of 15 N and 30 N were applied to the premolars and molars, respectively. The lateral and inferior borders of the models were constrained, with all degrees of freedom equal to zero. Eight-node elements with plane strain assumption were used for simulation.The authors found that TISPs with a short span and wider-diameter implants resulted in more homogenous stress distribution and less stress concentration on the implants. The long span yielded higher stress concentrations on the implants and between the pontics.In all models analyzed, stress concentrations were present in the implants.
机译：本研究的目的是比较具有两个不同桥体跨度（三个单元对四个单元）的牙种植体支撑假体（TISPs）和单纯种植体支撑假体（ISPs）的应力分布。二维有限元模型由聚酯树脂铸模的射线照相构造而成，以模仿TISP和ISP。总共分析了八个模型。将15 N和30 N的咬合负荷分别施加到前磨牙和磨牙。限制了模型的横向和劣势边界，所有自由度均等于零。使用具有平面应变假设的八节点单元进行仿真。作者发现，跨距短，直径较大的植入物的TISP会导致均匀分布的应力更加均匀，并且应力集中的应力较小。大跨度在植入物上和桥体之间产生更高的应力集中。在所有分析的模型中，植入物中都存在应力集中。

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