Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Randomized Controlled Trial
. 2023 Oct;27(10):5999-6006.
doi: 10.1007/s00784-023-05213-w. Epub 2023 Aug 24.

Comparison of nasal cavity changes between the expander with differential opening and the fan-type expander: a secondary data analysis from an RCT

Rodrigo Teixeira  1 , Camila Massaro  2 , Daniela Garib  2
Affiliations
Randomized Controlled Trial

Comparison of nasal cavity changes between the expander with differential opening and the fan-type expander: a secondary data analysis from an RCT

Rodrigo Teixeira et al. Clin Oral Investig. 2023 Oct.

Abstract

Introduction: The aim of this study was to compare the nasal cavity skeletal changes between the expander with differential opening (EDO) and the fan-type expander (FE).

Methods: This study was a secondary analysis of a previous randomized clinical trial. Forty-eight patients with posterior crossbite were randomly allocated into two study groups. Twenty-four patients (11 male, 13 female) with a mean initial age of 7.6 ± 0.9 years were treated with rapid maxillary expansion (RME) using the EDO. Twenty-four patients (10 male, 14 female) with a mean initial age of 7.8 ± 0.9 years were treated with the FE. Cone-beam computed tomography (CBCT) was performed before treatment and 1 to 6 months after the active phase of RME. Using frontal CBCT slices passing at the level of maxillary permanent first molars and maxillary deciduous canines, the width of the nasal cavity was measured in the lower, middle and upper thirds. Nasal cavity height was also evaluated in both slices. Intergroup comparisons of interphase changes were performed using t or Mann-Whitney tests (P < 0.05).

Results: The two groups were similar regarding baseline data. EDO showed a greater transverse increase in the lower third of the nasal cavity in both canine (P = 0.007) and molar regions (P < 0.001). No intergroup difference was observed for changes in middle and upper widths and height of the nasal cavity.

Conclusions: Both expanders are effective in promoting an increase of the nasal cavity skeletal dimensions. The expander with differential opening produced a greater transverse increase in the lower third of the nasal cavity compared to the fan-type expander, both at the anterior and posterior regions of the maxilla.

Clinical relevance: EDO might be more beneficial to pediatric patients with oral breathing and obstructive sleep apnea compared to FE.

Keywords: Cone-beam computed tomography; Palatal expansion technique; Posterior crossbite; Upper airway.

PubMed Disclaimer

References

    1. Dimberg L, Lennartsson B, Söderfeldt B, Bondemark L (2013) Malocclusions in children at 3 and 7 years of age: a longitudinal study. Eur J Orthod 35(1):131–137. https://doi.org/10.1093/ejo/cjr110 - DOI - PubMed
    1. Haas AJ (1965) The treatment of maxillary deficiency by opening the midpalatal suture. Angle Orthod 35:200–217. https://doi.org/10.1043/0003-3219(1965)035<0200:Ttomdb>2.0.Co;2 - DOI - PubMed
    1. Haas AJ (1961) Rapid expansion of the maxillary dental arch and nasal cavity by opening the midpalatal suture. Angle Orthod 31(2):73–90. https://doi.org/10.1043/0003-3219(1961)031<0073:REOTMD>2.0.CO;2 - DOI
    1. da Silva Filho OG, Montes LA, Torelly LF (1995) Rapid maxillary expansion in the deciduous and mixed dentition evaluated through posteroanterior cephalometric analysis. Am J Orthod Dentofacial Orthop 107(3):268–275. https://doi.org/10.1016/s0889-5406(95)70142-7 - DOI - PubMed
    1. Cappellette M Jr, Alves F, Nagai LHY, Fujita RR, Pignatari SSN (2017) Impact of rapid maxillary expansion on nasomaxillary complex volume in mouth-breathers. Dent Press J Orthod 22(3):79–88. https://doi.org/10.1590/2177-6709.22.3.079-088.oar - DOI

Publication types

LinkOut - more resources