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

Guan, Hong, van Staden, Rudi, Loo, Yew-Chaye, Johnson, Newell, Ivanovski, Saso and Meredith, Neil (2009) Influence of bone and dental implant parameters on stress distribution in the mandible: a finite element study. International Journal of Oral and Maxillofacial Implants, 24 5: 866-876.

Author Guan, Hong
van Staden, Rudi
Loo, Yew-Chaye
Johnson, Newell
Ivanovski, Saso
Meredith, Neil
Title Influence of bone and dental implant parameters on stress distribution in the mandible: a finite element study
Journal name International Journal of Oral and Maxillofacial Implants   Check publisher's open access policy
ISSN 0882-2786
1942-4434
Publication date 2009-09
Sub-type Article (original research)
Volume 24
Issue 5
Start page 866
End page 876
Total pages 11
Place of publication Hanover Park, IL, United States
Publisher Quintessence Publishing
Language eng
Formatted 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.
Keyword Cancellous bone
Cortical bone
Dental implants
Finite element technique
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Dentistry Publications
 
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