Evaluation of stress distribution in mandible during orthodontic and orthopaedic force application using finite element method

Abstract

AIM:

The aim of this study was to evaluate the effects of the orthopedic and orthodontic forceson the mandible using 3-dimensional (3D) finite element stress analysis. The various forces that are taken into consideration are 3 loads of each type: Activator, Chincup, the combination of activator and headgear and the orthodontic forces.

METHOD:

A 3D finite element model of the mandible was constructed using a CT scan of a patient. The model consisted of 514,973 elements and 101,058 nodes. The stress regions and deformations were studied under 3 different loads for each type of force application.

RESULTS:

The principle stresses and Von mises stress were seen at the neck of the condyle and the displacement is seen at the chin in all the types of force applications studied.

CONCLUSION AND SUMMARY:

In all the cases studied, the results show that the highest values of principle stress, Von Mises stresses are maximum at the neck of the condyle. The highest values for deformation are at the chin.

Keywords

Activator activator high-pull headgear combination chincup orthodontic forces deformation Principle stress von mises stress neck of the condyle chin

References

Ulusoy

Ç.

and Darendeliler

, Effects of class II activator and class II activator high-pull headgear combination on the mandible: A 3-dimensional finite element stress analysis study, Am J Orthod Dentofacial Orthop133 (2008), 490.e9-490.e15.

Nickel

J.C.

, Iwasaki

L.R.

, Beatty

M.W.

, Moss

M.A.

and Marx

D.B.

, Static and dynamic loading effects on temporomandibular joint disc tractional forces, J Dent Res85 (2006), 809-813.

Deguchi

, Nasu

, Murakami

, Yabuuchi

, Kamioka

and Takano-Yamamoto

, Quantitative evaluation of cortical bone thickness with computed tomographic scanning for orthodontic implants, Am J Orthod Dentofacial Orthop129 (2006), 721.e7-12.

Katona

T.K.

, Paydar

N.H.

, Akay

H.U.

and Roberts

W.E.

, Stress analysis of bone modelling response to rat molar orthodontics, J Biomech28 (1995), 27-38.

O'Brien

W.J.

, Dental materials and their selection, 2nd ed., Chicago: Quintessence, 1997.

Zaimoglu

, Can

, Ersoy

and Aksu

, Diş hekimliǧinde maddeler bilgisi, 1st ed. Ankara, Turkey: Ankara University Press, 1993.

Koolstra

J.H.

, Van Eijden

T.M.G.J.

, Van Spronsen

P.H.

, Weijs

W.A.

and Valk

, Computer-assisted estimation of lines of action of human masticatory muscles reconstructed in vivo by means of magnetic resonance imaging of parallel sections, Arch Oral Biol35 (1990), 549-556.

Weijs

W.A.

and Hillen

, Relationship between the physiological cross-section of the human jaw muscles and their cross-sectional area in computer tomograms, Acta Anat118 (1984), 129-138.

Koolstra

J.H.

and Van Eijden

T.M.G.J.

, Application and validation of a three dimensional mathematical model of the human masticatory system in vivo, J Biomech25 (1992), 175-187.

10.

Meyer

, Kahn

J.L.

, Lambert

, Boutemy

and Wilk

, Development of a static simulator of the mandible, J Craniomaxillofac Surg28 (2000), 278-286.

11.

Clelland

N.L.

, Ismail

Y.H.

, Zaki

H.S.

and Pipko

, Three-dimensional finite element stress analysis in and around the screw-vent implant, Int J Oral Maxillofac Implants6 (1991), 391-398.

12.

Vollmer

, Meyer

, Joos

, Vegh

and Piffko

, Experimental and finite element study of a human mandible, J Craniomaxillofac Surg28 (2000), 91-96.

13.

Nagahara

, Murata

, Nakamura

and Tsuchiya

, Displacement and stress distribution in the temporomandibular joint during clenching, Angle Orthod69 (1999), 372-379.

14.

Singh

G.D.

and Clark

W.J.

, Localization of mandibular changes in patients with class II division 1 malocclusions treated with twin-block appliances: Finite element scaling analysis, Am J Orthod Dentofacial Orthop119 (2001), 419-425.

15.

Motoyoshi

, Hirabayashi

, Shimazaki

and Namura

, An experimental study on mandibular expansion: increases in arch width and perimeter, Eur J Orthod24 (2002), 125-130.

16.

Tanaka

, Rodrigo

, Tanaka

, Kawaguchi

, Shibazaki

and Tanne

, Stress analysis in the TMJ during jaw opening by use of a three-dimensional finite element model based on magnetic resonance images, Int J Oral Maxillofac Surg30 (2001), 421-430.

17.

Nagahara

, Murata

, Nakamura

and Tsuchiya

, Displacement and stress distribution in the temporomandibular joint during clenching, Angle Orthod69 (1999), 372-379.

18.

Meyer

, Kahn

J.L.

, Lambert

, Boutemy

and Wilk

, Development of a static simulator of the mandible, J Craniomaxillofac Surg28 (2000), 278-286.

19.

Basciftci

F.A.

, Uysal

, Buyukerkmen

and Sari

, The effects of activator treatment on craniofacial structures of class II division I patients, European Journal of Orthodontics25 (2003), 87-93.

20.

Ruf

, Baltromejus

and Pancherz

, Effective condylar growth and chin position changes in activator treatment: a cephalometric roentgenographic study, Angle Orthodontist71(1) (2001), 4-11.

21.

Pancherz

, The mandibular plane angle in activator treatemnt, Angle Orthodontist49(1) (January 1979), 11-20.

22.

Singh

G.D.

and Clark

W.J.

, Localization of mandibular changes in patients with class II division 1 malocclusions treated with twin-block appliances: Finite element scaling analysis, American Journal of Orthodontics & Dentofacial Orthopedics119(4) (April 2001), 419-425.

23.

Levy

A.J.

, Chaconas

S.J.

and Caputo

A.A.

, Orthopedic effect of the extraoral chin cup appliance on the mandible, Am J Orthod69(1) (Jan 1976), 29-41.

24.

Basciftci

F.A.

, Korkmaz

H.H.

, Üşümez

et al., Biomechanical evaluation of chincup treatment with various force vectors, American Journal of Orthodontics and Dentofacial Orthopedics134(6) (2008), 773-781.

25.

Bolouri

and Vahid Golpayegani

, An evaluation of biomechanical changes in mandible due to orthopedic chin cup forces, Journal Of Dental School Spring20(1) (2002), 20-27.

26.

Marşan

, Effects of activator and high-pull headgear combination therapy: Skeletal dentoalveolar and soft tissue profile changes, Eur J Orthod29(2) (Apr 2007), 140-148.

27.

Bendeus

, Hãgg

and Rabie

, Growth and treatment changes in patients treated with a headgear-activator appliance, American Journal of Orthodontics and Dentofacial Orthopedics121(4) (2002), 376-384.

28.

Levin

R.I.

, Activator headgear therapy, American Journal of Orthodontics87(2) (1985), 91-109.

29.

Weiland

F.J.

, Ingervall

, Bantleon

H.P.

et al., Initial effects of treatment of class II malocclusion with the herren activator activator-headgear combination and jasper jumper, American Journal of Orthodontics and Dentofacial Orthopedics112(1) (1997), 19-27.

30.

Shaheen

V.S.

, Evaluation of stress distribution in the anterior segment during enmasse retraction using finite element method, Dissertation submitted to the Rajiv Gandhi University of Health Sciences, 2007.

31.

Prem

, Evaluation of stress related changes in the PDL during maxillary canine retraction - A 3D finite element study, Dissertation submitted to the Rajiv Gandhi University of Health Sciences, 2007.

32.

Husain

, Stress distribution during retraction with micro-implants a three dimensional finite element study, Dissertation submitted to the Rajiv Gandhi University of Health Sciences, 2008.

33.

Paulose

V.K.

, Evaluation of stress related changes in the periodontal ligament of maxillary teeth during force application from different implant sites: A 3-D finite element study, Dissertation Submitted To The Rajiv Gandhi University Of Health Sciences, 2008.

34.

Park

Y.C.

, Choi

Y.G.

, Choi

N.C.

and Lee

J.S.

, Esthetic segmental retraction of maxillary anterior teeth with a palatal appliance and orthodontic mini-implants, Am J Orthod Dentofac Orthop131 (2007), 537-544.