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Effect of Thread Design of Orthodontics Mini Implants on Their Stability - A Pilot Study

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2016

Key Words:

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
Objectives- This FEM study was conducted in order to investigate the effect of thread design of an orthodontic mini-implant on primary stability and strain pattern and magnitude in the surrounding bone structure during orthodontic loading. Materials and Methods- The mini-implants by six different manufacturers such as Aarhus Mini-Implant (American Orthodontics), AbsoAnchor (Dentos), Dual-Top (Jeil Medical), LOMAS (Mondeal), IMTEC Mini Ortho Implant (IMTEC), tomas (Dentaurum) were placed in porcine jaw bone segments and they were subjected to micro CT scan. FE model was constructed using program system MSC. Marc/Mentat. The load of 400 grams was gradually applied. In each case we determined the deflection of the implant head as well as the distribution of strain in the cortical and cancellous bone. To investigate the effect on stability, the resulting force/deflection ratios were calculated. One way ANOVA test was used to analyze the correlation between resulting bone strain and thread depth and thread edge. The resulting strain was ranging from 324 for to 2000 (Aarhus 9.6X2 and Abs anchor 10.5x1.4, respectively). No statistically difference was found for all the mini implants in relation to thread edge (P>0.05). However statistically difference was found between the thread depth (p<0.05) where the mini implants with deeper thread showed more strain than that with less depth. Even the strain for all the implants was within the physiological limits, mini implants with deeper thread showed more bone strain than the with less depth. No statistic difference was found between the mini implant with sharp and blunt edges.
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REFERENCES

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International Journal of Science and Engineering Investigations, Volume 5, Issue 50, March 2016 28
www.IJSEI.com Paper ID: 55016-05
ISSN: 2251-8843
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