一种通过有限元方法对牙种植体进行三维几何模型分析的方法。

A method for obtaining a three-dimensional geometric model of dental implants for analysis via the finite element method.

机构信息

Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil.

出版信息

Implant Dent. 2013 Jun;22(3):309-14. doi: 10.1097/ID.0b013e318288d548.

DOI:10.1097/ID.0b013e318288d548

PMID:23680977

Abstract

PURPOSE

The aim of the study was to present a methodology of development of a virtual 3-dimensional dental implant model for analyses via the finite element method.

MATERIALS AND METHODS

A set, consisting of a dental implant and abutment, was embedded in acrylic resin for subsequent metallographic grinding and polishing. After the evidentiation of the internal geometry of the implant, the specimen was treated in a sputter for observation using scanning electron microscopy (SEM). The SEM image was transported to computer-aided design software by which all details of the implant were measured. With the measures obtained, the geometry was reproduced with 3-dimensional modeling software. Finally, the model was imported into finite element method analysis software with which it was discretized, generating a mesh.

RESULTS

A model with the accurate geometry of the implant was developed. A mesh of 297,600 elements and 490,045 nodes was generated. An aleatory acceleration simulation was performed to test the mesh, and no errors were identified.

CONCLUSION

The developed methodology generated a precise dental implant model, which can be applied in different finite element method simulations.

摘要

目的

本研究旨在提出一种通过有限元法对三维虚拟牙科植入物模型进行分析的方法。

材料和方法

将一组包括植入物和基台的组件嵌入丙烯酸树脂中，以便随后进行金相研磨和抛光。在凸显植入物的内部几何形状后，用喷金处理样本，然后用扫描电子显微镜（SEM）进行观察。将 SEM 图像传输到计算机辅助设计软件中，通过该软件可以测量植入物的所有细节。根据获得的测量值，使用三维建模软件复制几何形状。最后，将模型导入有限元法分析软件中进行离散化，生成网格。