Journal List > J Korean Acad Periodontol > v.37(Suppl) > 1049678

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Yoon, Jung, Lee, Kim, Kim, Cho, Kim, and Choi: Contact non-linear finite element model analysis of initial stability of mini implant
Original Article

The Journal of the Korean Academy of Periodontology 2007; 37(4): 681-690.

Published online: 31 December 2007

DOI: https://doi.org/10.5051/jkape.2007.37.4.681

Contact non-linear finite element model analysis of initial stability of mini implant

Hyun-joo Yoon1, Ui-Won Jung1, Jong-suk Lee2, Chang-Sung Kim1, Jung-moon Kim3, Kyoo-Sung Cho1, Chong-Kwan Kim1, Sung-ho Choi1

1Department of Periodontology, Oral Science Research Center, College of Dentistry, Yonsei University, Korea.

2G.O.Net Dental Clinic, Korea.

3Ortholution Co., Ltd, Korea.

Corresponding author (shchoi726@yumc.yonsei.ac.kr)

Copyright © 2007 Korean Academy of Periodontology

Abstract

Mini implants had been used provisionally for the healing period of implants in the beginning. But it becomes used for the on-going purpose, because it is simple to use, economic and especially suitable for the overdenture. But there is few studies about the stability of mini implants, that is most important factor for the on-going purpose, and particularly the implant parameters affecting the initial stability.
The purpose of this study was to evaluate the stress and the strain distribution pattern of immediate- loaded screw type orthodontic mini-implant and the parameters affecting the initial stability of immediate-loaded mini-implant. Two dimensional finite element models were made and contact non-linear finite element analysis was performed. The magnitude and distribution of Von Mises stresses were evaluated.
The obtained results were as follows:
1. The stress was concentrated on the thread tip of an implant in the cortical bone.
2. The direction of load is the most important factor for the stress distribution in cortical bone.
3. The diameter of an implant is the most important factor for the stress distribution in the trabecular bone.
In conclusion, if the horizontal load vector is successfully controlled, mini-implants, which diameter is under 3mm, can be used for the on-going purpose.

Keywords: Mini-implant, stress, cortical bone, trabecular bone, contact finite element analysis

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