Maxillary expansion in customized finite element method models

Lee, Haofu; Ting, Kang; Nelson, Michael; Sun, Nichole; Sung, Si‐Young

doi:10.1016/j.ajodo.2008.08.023

Cited by 58 publications

(52 citation statements)

References 17 publications

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“…The removal of the suture, related to the total displacement applied, varied according to the behavior assumed for MPS (bilinear, linear and absent). The large variation in the displacements observed when changing tissue behavior from linear to bilinear agrees with the statement that different mechanical behaviors of the suture are related to the differences in clinical RME outcomes, as suggested by Lee et al (2009). This assumption could be extrapolated to clinical results and propose that different ossification stages and imbrications levels of the MPS, that affects the stiffness of the suture, may partly explain the variability of the measures for palatal opening in clinical RME studies.…”

Section: Discussionsupporting

confidence: 71%

“…All studies in this review accepted linear elastic properties for MPS. Lee et al (2009), comparing three FE models (maxilla without a midpalatal suture, maxilla with suture elements and maxilla without suture elements), suggested that different states of MPS may partly explain the differences in clinical studies of RME.…”

Section: Introductionmentioning

confidence: 99%

“…Biomechanical studies (Gautam et al, 2007;Iseri et al, 1998;Jafari et al, 2003;Lee et al, 2009;Provatidis et al, 2008) attempted to improve the understanding of this phenomenon and to evaluate how this orthodontic therapy affects other regions of the skull. But most of them considered only linear elastic constitutive model for the analysis, which potentially can result in a model that provides an improved representation of the expansion process.…”

Section: Introductionmentioning

confidence: 99%

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A bilinear elastic constitutive model applied for midpalatal suture behavior during rapid maxillary expansion

et al. 2015

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Introduction: This study aims to evaluate the influence of the biomechanical behavior of the midpalatal suture (MPS) during the rapid maxillary expansion (RME) when modeled by the Finite Element Method. Methods: Four simulation alternatives are discussed and, for each analysis, the suture is considered as a functional unit with a different mechanical behavior: (i) without MPS elements, (ii) MPS with Young's modulus (E) equal to 1 MPa, (ii) MPS with E equal to 0.01 MPa and (iv) MPS with bilinear elastic behavior. Results: The stress analysis showed that, when MPS is not considered in the model, stress peaks are reduced in magnitude and their distribution is restricted to a smaller area when compared to the model with the inclusion of MPS (E=1 MPa).The increased suture stiffness also has a direct influence on MPS displacements after 30 expander activations. Conclusion:The consideration of the MPS in RME computer models influences greatly the calculated displacements between the suture bone ends, even as the stress levels in maxillary structures. Furthermore, as proposed for the described model, the elastic bilinear behavior assigned to MPS allows coherent prediction of stresses and displacements results, being a good representation for this suture overall behavior.

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Section: Discussionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A bilinear elastic constitutive model applied for midpalatal suture behavior during rapid maxillary expansion

et al. 2015

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“…Stresses also occur in the region surrounding the silcus of the auditory tube. This indicates that the RME can have a significant impact on the increase of the nasal cavity dimension and improve nasal breathing [1,11,12,16,23] just as it leads to changes of the auditory conductivity in patients with cleft palate. The short-term and long-term impacts of maxillary expansion on the auditory conduction are described in [14].…”

Section: Fig 4 Stress Patterns In Sulc After Activation Of Modelmentioning

confidence: 99%

“…The FE analysis of the orthodontic loads distributions during RME of the craniofacial complex without palate cleft was performed in [3,6,7,[10][11][12][13]17]. An extensive review of the FE calculations of stresses and displacements of the maxillary complex under the action of different types of the orthodontic appliances was carried out in the recent study [13].…”

Section: Introductionmentioning

confidence: 99%