FEM analysis of a new miniplate: stress distribution on the plate, screws and the bone

Didem Nalbantgil; Murat Tozlu; Fulya Ozdemir; Mehmet Oguz Oztoprak; Tulin Arun

doi:10.1055/s-0039-1698925

European Journal of Dentistry, Table of Contents

CC BY-NC-ND 4.0 · Eur J Dent 2012; 06(01): 009-015
DOI: 10.1055/s-0039-1698925

Original Article

Dental Investigation Society

FEM analysis of a new miniplate: stress distribution on the plate, screws and the bone

Didem Nalbantgil

¹Department of Orthodontics, Faculty of Dentistry, Yeditepe University, Istanbul

,

Murat Tozlu

¹Department of Orthodontics, Faculty of Dentistry, Yeditepe University, Istanbul

,

Fulya Ozdemir

¹Department of Orthodontics, Faculty of Dentistry, Yeditepe University, Istanbul

,

Mehmet Oguz Oztoprak

¹Department of Orthodontics, Faculty of Dentistry, Yeditepe University, Istanbul

,

Tulin Arun

²Private practice, Istanbul

› Author Affiliations

Abstract

PDF Download

ABSTRACT

Objectives: Non-homogeneous force distribution along the miniplates and the screws is an unsolved question for skeletal anchorage in orthodontics. To overcome this issue, a miniplate structure was designed featuring spikes placed on the surface facing the cortical bone. The aim of this study was to examine and compare the force distribution of the newly designed plate-screw systems with the conventional one.

Methods: A model of bone surface with 1.5 mm cortical thickness, along with the two newly designed miniplates and a standard miniplate-screw were simulated on the three-dimensional model. 200 g experimental force was applied to the tip of the miniplates and the consequential effects on the screws and cortical bone was evaluated using three-dimensional finite element method.

Results: As a result of this finite element study, remarkably lower stresses were observed on the screws and the cortical bone around the screws with the newly designed miniplate when compared with the conventional one.

Conclusion: The newly designed miniplate that has spikes was found effective in reducing the stress on and around the screws and the force was distributed more equivalently. (Eur J Dent 2012;6:9-15)

Key words

Miniplate - stability - stress distribution - finite element analysis

PDF (2136 kb)

References

REFERENCES
1 Wehrbein H, Merz BR, Diedrich P, Glatzmaier J. The use of palatal implants for orthodontic anchorage. Design and clinical application of the orthosystem. Clin Oral Implants Res 1996;7:410-416.
2 Roberts WE, Helm FR, Marshal KJ, Gongloff RK. Rigid endosseous implants for orthodontic and orthopaedic anchorage. Angle Orthod 1989;59:247-256.
3 Block MS, Hoffman DR. A new device for absolute anchorage for orthodontics. Am J Orthod Dentofacial Orthop 1995;107:251-258.
4 Melsen B, Petersen JK, Costa A. Zygoma ligatures: an alternative form of maxillary anchorage. J Clin Orthod 1998;32:154-158.
5 Kanomi R. Mini-implant for orthodontic anchorage. J Clin Orthod 1997;31:763-767.
6 Costa A, Raffaini M, Melsen B. Microscrews as orthodontic anchorage: a preliminary report. Int J Adult Orthod Orthognathic Surg 1998;13:201-209.
7 Lee JS, Park HS, Kyung HM. Micro-implant anchorage for lingual treatment of a skeletal class II malocclusion. J Clin Orthod 2001;35:643-647.
8 Park HS, Bae SM, Kyung HM, Sung JH. Micro-implant anchorage for treatment of skeletal Class I bialveolar protrusion. J Clin Orthod 2001;35:417-422.
9 Polat-Ozsoy O. The use of intraosseous screw for upper molar distalization: a case report Eur J Dent 2008;2:115-121.
10 Erverdi N, Usumez S, Solak A. New generation openbite treatment with zygomatic anchorage. Angle Orthod 2006;76:519-526.
11 Umemori M, Sugawara J, Mitani H, Nagasaka H, Kawamura H. Skeletal anchorage system for open-bite correction. Am J Orthod Dentofacial Orthop 1999;115:166-174.
12 Jenner JD, Fitzpatrick BN. Skeletal anchorage utilizing bone plates. Aust Orthod J 1985;9:231-233.
13 Cornelis M, Scheffler N, Mahy P, Siciliano S, Clerk H, Tulloch C. Modified miniplates for skeletal anchorage in orthodontics:placement and removal surgeries. J Oral Maxillofacial Surg 2008;66:1439-1445.
14 Chung K, Kim Y, Linto JL, Lee Y. The miniplate with tube for skeletal anchorage. J Clin Orthod 2002;36:407-412.
15 De Clerk H, Geerinckx V, Sciliano S. The zygoma anchorage system. J Clin Orthod 2002;36:455-459.
16 Sherwood KH, Burch J, Thompson W. Intrusion of supererupted molars with titanium miniplate anchorage. Angle Orthod 2003;73:597-601.
17 Choi BH, Zhu JS, Kim HY. A clinical evaluation of titanium miniplates as anchors for orthodontic treatment. Am J Orthod Dentofacial Orthop 2005;128:382-384.
18 Mommaerts MY, Michiels E, De Pauw G. A 2-year outcome audit of a versatile orthodontic bone anchor. J Orthod 2005;32:175-181.
19 Veziroglu F, Uckan S, Ozden UA, Arman. A Stability of Zygomatic Plate-Screw Orthodontic Anchorage System. Angle Orthod 2008;78:902-907.
20 Gracco A, Boccaccio A, Cirignaco A, Cozzani M, Pappalettere C, Vitale G. Numerical/experimental analysis of the stress field around miniscrews for the orthodontic anchorage. Eur J Orthod 2009 Feb;31:12-20.
21 Dalstra M, Cattaneo P, Melsen B. Load transfer of miniscrews for orthodontic anchorage. Orthod 2004;1:53-62.
22 Nagasao T, Kobayashi M, Tsuchiya Y, Kaneko T, Nakajima T. Finite element analysis of the stresses around endosseous implants in various reconstructed mandibular models. J Craniomaxillofac Surg 2002;30:170-177.
23 Park J, Cho H. Three-dimensional evaluation of interradicular spaces and cortical bone thickness for the placement and initial stability of microimplants in adults. Am J Orthod Dentofac Orthop 2009;136:314-315.
24 Baumgaertel S,Hans M. Buccal cortical bone thickness for mini-implant placement. Am J Orthod Dentofacial Orthop 2009;136:230-235.
25 Li W, Swain MV, Li Q. Towards automated 3D finite element modeling of direct fiber reinforced composite dental bridge. J Biomed Mater Res B Appl Biomater 2005;74:520-528.
26 Reynders R, Ronchi L, Bipat S. Mini-implants in orthodontics: A systematic review of the literature. Am J Orthod Dentofac Orthop 2009;135:564.e1-564.e19.
27 Haug R. The effect of screw number length on two methods of tension and plating. J Oral Maxillofac Surg 1993;51:159-162.
28 Miyawaki S, Koyama I, Inoue M, Mishima K, Sugahara T, Takano-Yamamoto T. Factors associated with the stability of titanium screws placed in the posterior region for orthodontic anchorage. Am J Orthod Dentofacial Orthop 2003;124:373-378.