Reimann Łukasz, Żmudzki Jarosław, Dobrzański Leszek A
Institute of Materials Engineering and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Gliwice, Poland.
Acta Bioeng Biomech. 2015;17(1):51-9.
The aim of the study was to analyse the strength of a prosthetic bridge with variable geometry in the connectors between the span and the retention elements on the pillar teeth crowns.
Research was carried using the Finite Elements Method (FEM) on a model of the bridge in the anterior teeth arch in the field 21-22-23, obtained using a contact scanner and computer aided design (CAD) system, with four different cross-sectional areas of the connectors: 4.0, 5.0, 5.5, and 6.0 mm2. For that purpose, the impact of the properties of selected metal alloys on the deflection of the prosthesis was analysed.
On the basis of the analyses, it was found that when the loading force acted obliquely, the stress was 19% higher compared to the stress with a loading vertical force. In the case of connectors with the smallest cross-sectional area, the stress exceeded permissible value (with safety factor n = 2) for one of the alloys.
Deflection of the bridges tested changed depending on the connector cross-section and the elastic modulus of the selected material.
本研究旨在分析在桥体跨度与支柱牙冠上固位元件之间的连接体中，具有可变几何形状的修复桥的强度。
采用有限元法（FEM）对21 - 22 - 23区域前牙弓中的桥体模型进行研究，该模型通过接触式扫描仪和计算机辅助设计（CAD）系统获得，连接体具有四种不同的横截面积：4.0、5.0、5.5和6.0平方毫米。为此，分析了所选金属合金的性能对修复体挠度的影响。
基于分析发现，当加载力倾斜作用时，应力比垂直加载力时的应力高19%。在横截面积最小的连接体情况下，其中一种合金的应力超过了允许值（安全系数n = 2）。
所测试桥体的挠度根据连接体横截面和所选材料的弹性模量而变化。
