Influence of bone and dental implant parameters on stress distribution in the mandible: a finite element study

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Title Influence of bone and dental implant parameters on stress distribution in the mandible: a finite element study
Author Guan, Hong; Van Staden, Rudi Cobus; Loo, Yew-Chaye; Johnson, Newell Walter; Ivanovski, Saso; Meredith, Neil
Journal Name The International Journal of Oral & Maxillofacial Implants
Year Published 2009
Place of publication United States
Publisher Quintessence Publishing Co., Inc.
Abstract Purpose: The complicated relationships between mandibular bone components and dental implants have attracted the attention of structural mechanics researchers as well as dental practitioners. Using the finite element method, the present study evaluated various bone and implant parameters for their influence on the distribution of von Mises stresses within the mandible. Materials and Methods: Various parameters were considered, including Young's modulus of cancellous bone, which varies from 1 to 4 GPa, and that of cortical bone, which is between 7 and 20 GPa. Implant length (7, 9, 11, 13, and 15 mm), implant diameter (3.5, 4.0, 4.5, and 5.5 mm), and cortical bone thickness (0.3 to 2.1 mm) were also considered as parameters. Assumptions made in the analysis were: modeling of the complex material and geometric properties of the bone and implant using two-dimensional triangular and quadrilateral plane strain elements, 50% osseointegration between bone and implant, and linear relationships between the stress value and Young's modulus of both cancellous and cortical bone at any specific point. Results: An increase in Young's modulus and a decrease in the cortical bone thickness resulted in elevated stresses within both cancellous and cortical bone. Increases in the implant length led to greater surface contact between the bone and implant, thereby reducing the magnitude of stress. Conclusions: The applied masticatory force was demonstrated to be the most influential, in terms of differences between minimum and maximum stress values, versus all other parameters. Therefore loading should be considered of vital importance when planning implant placement.
Peer Reviewed Yes
Published Yes
Publisher URI
Copyright Statement Copyright 2009 Qintessence Publishing Co. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 24
Issue Number 5
Page from 866
Page to 876
ISSN 0882-2786
Date Accessioned 2010-02-16
Language en_AU
Research Centre Menzies Health Institute Qld; Molecular Basis of Disease
Faculty Griffith Health Faculty
Subject Dentistry
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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