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Maxillary expansion in customized finite element method models.
Am J Orthod Dentofacial Orthop. 2009 Sep; 136(3):367-74.AJ

Abstract

INTRODUCTION

The aims of this study were to develop a method for constructing a 3-dimensional finite-element model (FEM) of the maxilla and to evaluate the effects of transverse expansion on the status of various midpalatal sutures.

METHODS

A 3-dimensional FEM of the craniofacial complex was developed by using computed-tomography images and Bionix modeling software (version 3.0, CANTIBio, Suwon, Korea). To evaluate the differences between transverse expansion forces in the solid model (maxilla without a midpalatal suture), the fused model (maxilla with suture elements), and the patent model (maxilla without suture elements), transverse expansion forces of 100 g were applied bilaterally to the maxillary first premolars and the first molars.

RESULTS

The fused model expressed a stress pattern similar to that of the solid model, except for the decreased first principal stress concentration in the incisive foramen area. The patent model, however, had a unique stress pattern, with the stress translated superiorly to the nasal area. The anterior nasal spine and the central incisors moved downward and backward in both solid and fused models but moved primarily downward with a slight backward movement of the anterior nasal spine in the patent model.

CONCLUSIONS

Clinical observations of maxillary expansion can be explained by different suture statuses. This efficient and customized FEM model can be used to predict craniofacial responses to biomechanics in patients.

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Authors+Show Affiliations

Lee H
Resident, Section of Orthodontics, School of Dentistry, University of California at Los Angeles, Los Angeles, USA.
Ting K
No affiliation info available
Nelson M
No affiliation info available
Sun N
No affiliation info available
Sung SJ
No affiliation info available

MeSH

AdultBicuspidBiomechanical PhenomenaComputer SimulationCranial SuturesCraniosynostosesElastic ModulusFinite Element AnalysisHumansImaging, Three-DimensionalIncisorMaleMaxillaModels, BiologicalMolarNasal BoneNosePalatal Expansion TechniquePalateStress, MechanicalTomography, X-Ray Computed

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19732671

Clinical Trial Links

The Effect of Expansion on Craniofacial Sutures in Children Using 3D Imaging

Citation

Lee, Haofu, et al. "Maxillary Expansion in Customized Finite Element Method Models." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 136, no. 3, 2009, pp. 367-74.
Lee H, Ting K, Nelson M, et al. Maxillary expansion in customized finite element method models. Am J Orthod Dentofacial Orthop. 2009;136(3):367-74.
Lee, H., Ting, K., Nelson, M., Sun, N., & Sung, S. J. (2009). Maxillary expansion in customized finite element method models. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 136(3), 367-74. https://doi.org/10.1016/j.ajodo.2008.08.023
Lee H, et al. Maxillary Expansion in Customized Finite Element Method Models. Am J Orthod Dentofacial Orthop. 2009;136(3):367-74. PubMed PMID: 19732671.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Maxillary expansion in customized finite element method models. AU - Lee,Haofu, AU - Ting,Kang, AU - Nelson,Michael, AU - Sun,Nichole, AU - Sung,Sang-Jin, PY - 2007/11/01/received PY - 2008/08/01/revised PY - 2008/08/01/accepted PY - 2009/9/8/entrez PY - 2009/9/8/pubmed PY - 2009/9/30/medline SP - 367 EP - 74 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 136 IS - 3 N2 - INTRODUCTION: The aims of this study were to develop a method for constructing a 3-dimensional finite-element model (FEM) of the maxilla and to evaluate the effects of transverse expansion on the status of various midpalatal sutures. METHODS: A 3-dimensional FEM of the craniofacial complex was developed by using computed-tomography images and Bionix modeling software (version 3.0, CANTIBio, Suwon, Korea). To evaluate the differences between transverse expansion forces in the solid model (maxilla without a midpalatal suture), the fused model (maxilla with suture elements), and the patent model (maxilla without suture elements), transverse expansion forces of 100 g were applied bilaterally to the maxillary first premolars and the first molars. RESULTS: The fused model expressed a stress pattern similar to that of the solid model, except for the decreased first principal stress concentration in the incisive foramen area. The patent model, however, had a unique stress pattern, with the stress translated superiorly to the nasal area. The anterior nasal spine and the central incisors moved downward and backward in both solid and fused models but moved primarily downward with a slight backward movement of the anterior nasal spine in the patent model. CONCLUSIONS: Clinical observations of maxillary expansion can be explained by different suture statuses. This efficient and customized FEM model can be used to predict craniofacial responses to biomechanics in patients. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/19732671/Maxillary_expansion_in_customized_finite_element_method_models_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(09)00573-3 DB - PRIME DP - Unbound Medicine ER -