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

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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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Data availability

No datasets were generated or analysed during the current study.

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Funding

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Authors and Affiliations

  1. Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto (FORP/USP), University of São, Paulo – Cafe Ave, S/N, West Sub-sector, Ribeirão Preto, São Paulo, 14040-904, Brazil

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

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  1. Felippe Almeida Costa
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  2. Marcelo Santos Bahia
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  3. Priscila Quintino Chabot
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  4. Cassio Edvard Sverzut
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  5. Alexandre Elias Trivellato
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Contributions

Costa FA: Contributed to study design, acquisition of data, writing of the article, proof reading of the article and submission of the article. Bahia MS: Contributed to study design, writing of the article, proof reading of the article and submission of the article. Chabot PQ: Contributed to study design, writing of the article, proof reading of the article and submission of the article. Sverzut CE: Contributed to planning of study with regards to statistics, statistical analysis, proof reading of the article, study design, writing of the article and proof, reading of the article. Trivellato AE: Contributed to planning of study with regards to statistics, statistical analysis, proof reading of the article, study design, writing of the article and proof, reading of the article.

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Correspondence to Marcelo Santos Bahia.

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Compliance with Ethical Standards (#20224719.9.0000.5419).

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Costa, F.A., Bahia, M.S., Chabot, P.Q. et al. Three-dimensional assessment of the maxilla after modified surgically assisted rapid expansion: a retrospective study. Oral Maxillofac Surg (2024). https://doi.org/10.1007/s10006-024-01258-7

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