Experimental Study on the Stability Level Assessment of Mini-Implants for Orthodontic Anchorages

Abstract:

This paper presents some results of the experimental investigations that were aimed at assessing the primary stability of orthodontic mini-implant anchorage by measuring the tensile force with a special device adapted for traction in the axial direction and at a 45 degree angle, taking as variables bone characteristics (thickness and cortical bone density, thickness and density of the medulla). We used samples (pork ribs) whose characteristics were measured at computer tomography with a specialized software, in which there have been inserted orthodontic mini-implants with spherical head, round thread having different characteristics of shape and dimensions of the thread (length diameter, pitch). Experiments have provided information on the relationship between bone characteristics of samples and maximum traction force in the axial direction and at 45degree angle, as well as mini-implant primary stability.

• Periodical: Advanced Materials Research (Volume 1143)
• Pages: 160-166
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1143.160
• Online since: February 2017
• Authors: Alexandru Nicolau, Elisabeta Vasilescu*, Vlad Gabriel Vasilescu, Marian Neacsu
• Keywords: CBCT, Cortical Bone, Orthodontic Miniimplants, Primary Stability, Scheletal Anchorage, Tractive Forces

References

[1] Nicolau A.M., Vasilescu E., Milicescu V., Vasilescu V. G., Contribuţii la studiul mini-implanturilor de ancoraj orthodontic (Contributions to the study of orthodontic anchorage mini implants), Revista Română de Stomatologie, LXI, (1), (2015) 7-12.

DOI: 10.37897/rjs.2015.1.1

[2] Nicolau A.M., Vasilescu V.G., Milicescu V., Studii şi observaţii clinice asupra ancorajului orthodontic cu miniimplanturi (Studies and clinical observations on mini implants orthodontic anchorage), Revista Practica Medicală, X 1 (38), 2015, 217-223.

DOI: 10.37897/rjmp.2015.1.11

[3] Kuroda S, Sugawara Y, Deguci T, Kyung HM, Takano-Yamamoto T. Clinical use of miniscrew implants as orthodontic anchorage: Success rates and postoperative discomfort. Am. J. Orthod Dentofacial orthop. 131(1), (2007) 9-15.

DOI: 10.1016/j.ajodo.2005.02.032

[4] Ozdemir F. Tozlu M, Derya G. C, Corrtical bone thickness of alveolar process measured with cone-beam computed tomography in pacients with different facial types, American Journal of Orthodontics and Dentofacial Orthopedics, 143 (2), (2013).

DOI: 10.1016/j.ajodo.2012.09.013

[5] Graber, Vanarsdall V, Orthodontics Current principles and Techniques, Fourth Edition Elsevier Mosby, (2005)145-146 and 222-223.

[6] Nicolau A. M, Contribuţii la studiul miniimplanturilor de ancoraj (Contributions to the study of anchorage mini implants), PhD thesis, University Carol Davila, Bucuresti, (2015).

DOI: 10.37897/rjs.2015.1.1

[7] Wilmes B, Rademacher C, Olthoff G, Drescher D, Parameters affecting primary stability of orthodontic miniimplants. J. Orofac Orthop, 67(67), 2006, 162-174.

DOI: 10.1007/s00056-006-0611-z