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Computational and Mathematical Methods in Medicine
Volume 2015 (2015), Article ID 560645, 9 pages
http://dx.doi.org/10.1155/2015/560645
Research Article

A Further Finite Element Stress Analysis of Angled Abutments for an Implant Placed in the Anterior Maxilla

1School of Stomatology, Fujian Medical University, Fuzhou, Fujian 350000, China
2Department of Oral Implantology, Affiliated Stomatological Hospital of Fujian Medical University, Fuzhou, Fujian 350002, China
3Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou 510140, China
4Department of Stomatology, Hospital of Guangdong Crop Chinese People’s Armed Police Forces, Guangzhou, Guangdong 510507, China

Received 4 June 2014; Revised 3 September 2014; Accepted 6 September 2014

Academic Editor: Chung-Min Liao

Copyright © 2015 Dong Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To systematically measure and compare the stress distribution on the bone around an implant in the anterior maxilla using angled abutments by means of finite element analysis, three-dimensional finite element simplified patient-specific models and simplified models were created and analyzed. Systematically varied angled abutments were simulated, with angulation ranging from 0° to 60°. The materials in the current study were assumed to be homogenous, linearly elastic, and isotropic. Force of 100 N was applied to the central node on the top surface of the abutments to simulate the occlusal force. To simulate axial and oblique loading, the angle of loading was 0°, 15°, and 20° to the long axis of implant, respectively. There was the strong resemblance between the response curves for simplified patient-specific models and simplified models. Response curves under oblique loading were similar in both models. With abutments angulation increased, maximum von Mises stress firstly decreased to minimum point and then gradually increased to higher level. From a biomechanical point of view, favorable peri-implant stress levels could be induced by angled abutments under oblique loading if suitable angulation of abutments was selected.