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BMC Oral Health. 2017 Jul 14;17(1):113. doi: 10.1186/s12903-017-0404-3.

Digital evaluation of nasal changes induced by rapid maxillary expansion with different anchorage and appliance design.

Author information

1
Department of Surgical and Morphological Sciences, University of Messina, Via Consolare Valeria 1, Messina, Italy. rosamariaf@hotmail.it.
2
C/O Dental School, Via G. Piatti, 10, 21100, Velate, VA, Italy. rosamariaf@hotmail.it.
3
Private Practice in Orthodontics, Bari, Italy.
4
Research Fellow, University of insubria, Via G. Piatti, 10, Varese, Italy.
5
Department of Dentistry, University of Alberta, 11400 University Avenue, Edmonton, AB, Canada.
6
Section of Orthodontics, Department of Neuroscience, Reproductive Sciences and Oral Sciences, University of Naples Federico II, Via Pansini, 5, Naples, Italy.
7
Department of Biomedical Sciences, Dentistry and Morphological and Functional Imaging, University of Messina, Via Consolare Valeria 1, Messina, Italy.
8
Department of Surgical and Morphological Sciences, School of Medicine, University of Insubria, Via G. Piatti, 10, Varese, Italy.
9
School of Orthodontics, University of Naples, Naples, Italy.
10
Department of Surgical and Morphological Sciences, University of Insubria, Via G. Piatti, 10, Varese, Italy.

Abstract

BACKGROUND:

Scientific evidence showed that rapid maxillary expansion (RME) affects naso-maxillary complex, increasing nasal width and volume. This study aimed to evaluate nasal changes induced by rapid maxillary expansion with different anchorage and appliance design by using low dose and cone beam computed tomography.

METHODS:

A total of 44 patients (20 males, mean age 8y 8 m ± 1y 2 m; 24 females mean age 8y 2 m ± 1y 4 m) were included in the investigation and divided into three groups according to the appliance: Hyrax-type expander anchored to permanent teeth, modified Hyrax-type expander anchored to deciduous teeth, modified Haas-type expander anchored to deciduous teeth. Maxillary expansion was performed until overcorrection and the expander was passively kept in situ for 7 months at least. All patients had three-dimensional imaging before expansion (T0) and after the retention period (T1). Nasal floor width, nasal wall width, maxillary inter-molar width were measured by means of Mimics software. The paired sample t-test was employed to assess the significance of the differences between the time points; the analysis of variance test (ANOVA) was used to compare differences between groups.

RESULTS:

The statistical analysis revealed significant differences between T0 and T1 for each recorded measurement in each group; no significant differences were found by comparing groups.

CONCLUSIONS:

Rapid maxillary expansion produces a significant skeletal transverse expansion of nasal region in growing patients. No significant differences in nasal effects are expected when the appliance is anchored onto deciduous teeth, with or without the palatal acrylic coverage.

KEYWORDS:

Cone beam computed tomography; Low dose computed tomography; Nasal cavity; Rapid maxillary expansion

PMID:
28705206
PMCID:
PMC5513127
DOI:
10.1186/s12903-017-0404-3
[Indexed for MEDLINE]
Free PMC Article

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