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VOLUME 16 , ISSUE 5 ( May, 2015 ) > List of Articles


Evaluation of Fracture Resistance of Orthodontic Mini-implants in the Transmucosal Profile Region

Adelson Mota de Aguiar, Arilton Mota de Aguiar, Célia Regina Maio Pinzan-Vercelino, Fausto Silva Bramante

Citation Information : de Aguiar AM, de Aguiar AM, Pinzan-Vercelino CR, Bramante FS. Evaluation of Fracture Resistance of Orthodontic Mini-implants in the Transmucosal Profile Region. J Contemp Dent Pract 2015; 16 (5):372-375.

DOI: 10.5005/jp-journals-10024-1692

Published Online: 01-10-2015

Copyright Statement:  Copyright © 2015; The Author(s).



This study sought to compare the fracture resistance of three trademarked orthodontic mini-implants in the transmucosal profile region. Thirty-six mini-implants of three different brands, separated into groups I, II and III, were tested. Each group consisted of 12 mini-implants of 6 mm in length. The mean diameter and length of the transmucosal profile of the mini-implants were 1.90 and 2.0 mm in group I, 1.77 and 1.0 mm in group II and 1.50 and 1.0 mm in group III, respectively. The tests were performed on a universal testing machine in compression mode, with a 2,000 kgf load, a speed of 4.0 mm per minute and a chisel-shaped active tip, which acted crosssectionally on the transmucosal profile. Single-criterion analysis of variance was used to compare the three brands. A significance level of 5% and test power of 80% were adopted. The mean fracture resistance achieved by the mini-implants was 172.03 ± 25.59 N for group I, 162.35 ± 30.81 N for group II and 139.69 ± 42.99 N for group III. There was no statistically significant difference in mean fracture resistance among the tested mini-implant brands.


The transmucosal profile diameter does not seem to be a deciding factor in the choice of mini-implants to minimize the risk of fractures.

Clinical significance

Although being an in vitro study it is possible to believe that this new brand has a very satisfactory resistance to fracture and enables its use with great efficiency.

How to cite this article

de Aguiar AM, Bramante FS, de Aguiar AM, Pinzan-Vercelino CRM. Evaluation of Fracture Resistance of Orthodontic Mini-implants in the Transmucosal Profile Region. J Contemp Dent Pract 2015;16(5):372-375.

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