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Published in: Clinical Oral Investigations 1/2018

01-01-2018 | Original Article

The impact of rapid maxillary expansion on maxillary first molar root morphology of cleft subjects

Authors: Lucas Cardinal, Gabriela da Rosa Zimermann, Fausto Medeiros Mendes, Ildeu Andrade Jr, Dauro Douglas Oliveira, Gladys Cristina Dominguez

Published in: Clinical Oral Investigations | Issue 1/2018

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Abstract

Objectives

The aim of this prospective cohort study was to determine the effects of rapid maxillary expansion (RME) on the first molar roots of cleft lip and palate subjects along different root development stages.

Materials and methods

Thirty participants with unilateral cleft lip and palate were divided into three groups (n = 10), according to the type of expander used: Hyrax, iMini and Fan-type. A cone beam CT scan was performed before (T1) and 3 months after stabilization of the appliance (T2). Measurements of root lengths of the first permanent maxillary molars were taken to evaluate root development and external apical root resorption (EARR).

Results

Roots presenting open apexes before treatment exhibited a statistically significant increase in root length after treatment (P < .001). Conversely, there were no significant changes in the root length of roots that had closed apexes at the beginning of treatment (P > .05). Furthermore, there were no differences among groups, or correlation between cleft side and gender was found vis-à-vis to changes in the root length (p > .05).

Conclusions

Orthopaedic forces of RME were neither able to interrupt the root development process nor to cause EARR in cleft subjects.

Clinical relevance

As the RME is the most common orthodontic procedure in patients with cleft lip and palate, understanding its impact on dental structures is of fundamental importance.
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Metadata
Title
The impact of rapid maxillary expansion on maxillary first molar root morphology of cleft subjects
Authors
Lucas Cardinal
Gabriela da Rosa Zimermann
Fausto Medeiros Mendes
Ildeu Andrade Jr
Dauro Douglas Oliveira
Gladys Cristina Dominguez
Publication date
01-01-2018
Publisher
Springer Berlin Heidelberg
Published in
Clinical Oral Investigations / Issue 1/2018
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI
https://doi.org/10.1007/s00784-017-2121-3

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