Dimensional changes of upper airway after rapid maxillary expansion: A prospective cone-beam computed tomography study

Yoon Chang, Lisa J. Koenig, Jessica E. Pruszynski, Thomas G. Bradley, Jose A. Bosio, Dawei Liu

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Introduction: The aim of this prospective study was to use cone-beam computed tomography to assess the dimensional changes of the upper airway in orthodontic patients with maxillary constriction treated by rapid maxillary expansion. Methods: Fourteen orthodontic patients (mean age, 12.9 years; range, 9.7-16 years) were recruited. The patients with posterior crossbite and constricted maxilla were treated with rapid maxillary expansion as the initial part of their comprehensive orthodontic treatments. Before and after rapid maxillary expansion cone-beam computed tomography scans were taken to measure the retropalatal and retroglossal airway changes in terms of volume, and sagittal and cross-sectional areas. The transverse expansions by rapid maxillary expansion were assessed between the midlingual alveolar bone plates at the maxillary first molar and first premolar levels. The measurements of the before and after rapid maxillary expansion scans were compared by using paired t tests with the Bonferroni adjustment for multiple comparisons. Results: After rapid maxillary expansion, significant and equal amounts of 4.8 mm of expansion were observed at the first molar (P = 0.0000) and the first premolar (P = 0.0000) levels. The width increase at the first premolar level (20.0%) was significantly greater than that at the first molar level (15.0%) (P = 0.035). As the primary outcome variable, the cross-sectional airway measured from the posterior nasal spine to basion level was the only parameter showing a significant increase of 99.4 mm2 (59.6%) after rapid maxillary expansion (P = 0.0004). Conclusions: These results confirm the findings of previous studies of the effect of rapid maxillary expansion on the maxilla. Additionally, we found that only the cross-sectional area of the upper airway at the posterior nasal spine to basion level significantly gains a moderate increase after rapid maxillary expansion.

Original languageEnglish (US)
Pages (from-to)462-470
Number of pages9
JournalAmerican Journal of Orthodontics and Dentofacial Orthopedics
Volume143
Issue number4
DOIs
StatePublished - Apr 1 2013

Fingerprint

Palatal Expansion Technique
Cone-Beam Computed Tomography
Bicuspid
Orthodontics
Maxilla
Nose
Spine
Bone Plates
Malocclusion
Constriction
Prospective Studies

ASJC Scopus subject areas

  • Orthodontics

Cite this

Dimensional changes of upper airway after rapid maxillary expansion : A prospective cone-beam computed tomography study. / Chang, Yoon; Koenig, Lisa J.; Pruszynski, Jessica E.; Bradley, Thomas G.; Bosio, Jose A.; Liu, Dawei.

In: American Journal of Orthodontics and Dentofacial Orthopedics, Vol. 143, No. 4, 01.04.2013, p. 462-470.

Research output: Contribution to journalArticle

@article{529b6739fc4543fd81db14d2db4cf119,
title = "Dimensional changes of upper airway after rapid maxillary expansion: A prospective cone-beam computed tomography study",
abstract = "Introduction: The aim of this prospective study was to use cone-beam computed tomography to assess the dimensional changes of the upper airway in orthodontic patients with maxillary constriction treated by rapid maxillary expansion. Methods: Fourteen orthodontic patients (mean age, 12.9 years; range, 9.7-16 years) were recruited. The patients with posterior crossbite and constricted maxilla were treated with rapid maxillary expansion as the initial part of their comprehensive orthodontic treatments. Before and after rapid maxillary expansion cone-beam computed tomography scans were taken to measure the retropalatal and retroglossal airway changes in terms of volume, and sagittal and cross-sectional areas. The transverse expansions by rapid maxillary expansion were assessed between the midlingual alveolar bone plates at the maxillary first molar and first premolar levels. The measurements of the before and after rapid maxillary expansion scans were compared by using paired t tests with the Bonferroni adjustment for multiple comparisons. Results: After rapid maxillary expansion, significant and equal amounts of 4.8 mm of expansion were observed at the first molar (P = 0.0000) and the first premolar (P = 0.0000) levels. The width increase at the first premolar level (20.0{\%}) was significantly greater than that at the first molar level (15.0{\%}) (P = 0.035). As the primary outcome variable, the cross-sectional airway measured from the posterior nasal spine to basion level was the only parameter showing a significant increase of 99.4 mm2 (59.6{\%}) after rapid maxillary expansion (P = 0.0004). Conclusions: These results confirm the findings of previous studies of the effect of rapid maxillary expansion on the maxilla. Additionally, we found that only the cross-sectional area of the upper airway at the posterior nasal spine to basion level significantly gains a moderate increase after rapid maxillary expansion.",
author = "Yoon Chang and Koenig, {Lisa J.} and Pruszynski, {Jessica E.} and Bradley, {Thomas G.} and Bosio, {Jose A.} and Dawei Liu",
year = "2013",
month = "4",
day = "1",
doi = "10.1016/j.ajodo.2012.11.019",
language = "English (US)",
volume = "143",
pages = "462--470",
journal = "American Journal of Orthodontics and Dentofacial Orthopedics",
issn = "0889-5406",
publisher = "Mosby Inc.",
number = "4",

}

TY - JOUR

T1 - Dimensional changes of upper airway after rapid maxillary expansion

T2 - A prospective cone-beam computed tomography study

AU - Chang, Yoon

AU - Koenig, Lisa J.

AU - Pruszynski, Jessica E.

AU - Bradley, Thomas G.

AU - Bosio, Jose A.

AU - Liu, Dawei

PY - 2013/4/1

Y1 - 2013/4/1

N2 - Introduction: The aim of this prospective study was to use cone-beam computed tomography to assess the dimensional changes of the upper airway in orthodontic patients with maxillary constriction treated by rapid maxillary expansion. Methods: Fourteen orthodontic patients (mean age, 12.9 years; range, 9.7-16 years) were recruited. The patients with posterior crossbite and constricted maxilla were treated with rapid maxillary expansion as the initial part of their comprehensive orthodontic treatments. Before and after rapid maxillary expansion cone-beam computed tomography scans were taken to measure the retropalatal and retroglossal airway changes in terms of volume, and sagittal and cross-sectional areas. The transverse expansions by rapid maxillary expansion were assessed between the midlingual alveolar bone plates at the maxillary first molar and first premolar levels. The measurements of the before and after rapid maxillary expansion scans were compared by using paired t tests with the Bonferroni adjustment for multiple comparisons. Results: After rapid maxillary expansion, significant and equal amounts of 4.8 mm of expansion were observed at the first molar (P = 0.0000) and the first premolar (P = 0.0000) levels. The width increase at the first premolar level (20.0%) was significantly greater than that at the first molar level (15.0%) (P = 0.035). As the primary outcome variable, the cross-sectional airway measured from the posterior nasal spine to basion level was the only parameter showing a significant increase of 99.4 mm2 (59.6%) after rapid maxillary expansion (P = 0.0004). Conclusions: These results confirm the findings of previous studies of the effect of rapid maxillary expansion on the maxilla. Additionally, we found that only the cross-sectional area of the upper airway at the posterior nasal spine to basion level significantly gains a moderate increase after rapid maxillary expansion.

AB - Introduction: The aim of this prospective study was to use cone-beam computed tomography to assess the dimensional changes of the upper airway in orthodontic patients with maxillary constriction treated by rapid maxillary expansion. Methods: Fourteen orthodontic patients (mean age, 12.9 years; range, 9.7-16 years) were recruited. The patients with posterior crossbite and constricted maxilla were treated with rapid maxillary expansion as the initial part of their comprehensive orthodontic treatments. Before and after rapid maxillary expansion cone-beam computed tomography scans were taken to measure the retropalatal and retroglossal airway changes in terms of volume, and sagittal and cross-sectional areas. The transverse expansions by rapid maxillary expansion were assessed between the midlingual alveolar bone plates at the maxillary first molar and first premolar levels. The measurements of the before and after rapid maxillary expansion scans were compared by using paired t tests with the Bonferroni adjustment for multiple comparisons. Results: After rapid maxillary expansion, significant and equal amounts of 4.8 mm of expansion were observed at the first molar (P = 0.0000) and the first premolar (P = 0.0000) levels. The width increase at the first premolar level (20.0%) was significantly greater than that at the first molar level (15.0%) (P = 0.035). As the primary outcome variable, the cross-sectional airway measured from the posterior nasal spine to basion level was the only parameter showing a significant increase of 99.4 mm2 (59.6%) after rapid maxillary expansion (P = 0.0004). Conclusions: These results confirm the findings of previous studies of the effect of rapid maxillary expansion on the maxilla. Additionally, we found that only the cross-sectional area of the upper airway at the posterior nasal spine to basion level significantly gains a moderate increase after rapid maxillary expansion.

UR - http://www.scopus.com/inward/record.url?scp=84875907155&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875907155&partnerID=8YFLogxK

U2 - 10.1016/j.ajodo.2012.11.019

DO - 10.1016/j.ajodo.2012.11.019

M3 - Article

C2 - 23561406

AN - SCOPUS:84875907155

VL - 143

SP - 462

EP - 470

JO - American Journal of Orthodontics and Dentofacial Orthopedics

JF - American Journal of Orthodontics and Dentofacial Orthopedics

SN - 0889-5406

IS - 4

ER -