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06-05-2024 | Computed Tomography | Research

Three-dimensional assessment of the maxilla after modified surgically assisted rapid expansion: a retrospective study

Authors: Felippe Almeida Costa, Marcelo Santos Bahia, Priscila Quintino Chabot, Cassio Edvard Sverzut, Alexandre Elias Trivellato

Published in: Oral and Maxillofacial Surgery

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Abstract

Objective

This retrospective study aims to assess the three-dimensional dentoskeletal effects and median palatal suture opening pattern in patients undergoing modified surgically assisted maxillary rapid expansion (SARME) without pterygoid plate detachment.

Methods

Twenty-eight patients submitted to modified SARME between 2009 and 2016 were retrospectively evaluated through cone-beam computed tomography (CBCT). Dental and skeletal measurements were taken at three different operative periods (before the expansion - T0; at the end of the activation of the Hyrax device - T1; and six months after the immobilization of the device - T2). Statistical analyses, including ANOVA and Pearson’s correlation coefficient, were performed using SPSS software.

Results

SARME demonstrated significant transverse maxillary expansion (with an average of 6.05 mm) with a greater impact in the anterior region. Dental measurements, including canine and molar distances, exhibited significant changes over the operative periods. Bone measurements (ANS and PNS) presented small but significant alterations, including a slight inferior displacement of ANS during device activation. The nasal floor width increased, followed by a width reduction after immobilization. The median palatal suture predominantly exhibited a Type II (V-shaped) opening.

Conclusion

The modified SARME presented a transversal direction increase and a super-lower skeletal displacement, with the anterior region being more affected than the posterior region. There was no change in the anteroposterior direction of the maxilla. Additionally, there was an increase in the linear dental measurements and a decrease in the angular measurement, with a positive correlation between the amount of posterior bone expansion and molar expansion as a result of the treatment in the analyzed period.
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Metadata
Title
Three-dimensional assessment of the maxilla after modified surgically assisted rapid expansion: a retrospective study
Authors
Felippe Almeida Costa
Marcelo Santos Bahia
Priscila Quintino Chabot
Cassio Edvard Sverzut
Alexandre Elias Trivellato
Publication date
06-05-2024
Publisher
Springer Berlin Heidelberg
Published in
Oral and Maxillofacial Surgery
Print ISSN: 1865-1550
Electronic ISSN: 1865-1569
DOI
https://doi.org/10.1007/s10006-024-01258-7