Three-dimensional computed tomography analysis of airway volume changes after rapid maxillary expansion

Smith, Tamara; Ghoneima, Ahmed; Stewart, Kelton T.; Liu, Sean; Eckert, George J.; Halum, Stacy; Kula, Katherine

doi:10.1016/j.ajodo.2011.12.017

Cited by 120 publications

(144 citation statements)

References 25 publications

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“…All images were oriented in the sagittal, axial and coronal planes before taking measurements following methods used in previous airway studies. 22 This allowed us to determine changes in the condylar head position as the jaw opens.…”

mentioning

confidence: 99%

“…The airway and soft tissue measurements taken on CBCTs in both open and closed jaws are presented in Table I and Figures 4-7: [22][23][24] Sample size:…”

mentioning

confidence: 99%

“…22 With a sample size of 60 subjects, the study was designed to have 80% power to The primary investigator, L.G., performed reliability measures using 10 coded and randomized CBCT's on all parameters. These CBCT's were coded and randomized by the investigator's mentor (A.G.).…”

mentioning

confidence: 99%

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Three-dimensional computed tomography analysis of airway volume changes between open and closed jaw positions

Glupker

Kula

Parks

et al. 2015

American Journal of Orthodontics and Dentofacial Orthopedics

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confidence: 99%

“…The airway and soft tissue measurements taken on CBCTs in both open and closed jaws are presented in Table I and Figures 4-7: [22][23][24] Sample size:…”

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confidence: 99%

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Three-dimensional computed tomography analysis of airway volume changes between open and closed jaw positions

Glupker

Kula

Parks

et al. 2015

American Journal of Orthodontics and Dentofacial Orthopedics

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“…While, the palatopharyngeal volume showed a non-significant decrease after treatment which agrees with the results of Smith who found that the oropharyngeal airway volume decreased a little which was not significant and the author attributed it to the lowering of the palatine vault. (13) Also zeng in 2013 agreed with this non-significant decrease in the oropharynx, relating that to three reasons; Firstly, the breathing stage of the patients which was difficult to control. Secondly, there was a large variance among the sample.…”

Section: Discussionmentioning

confidence: 90%

The Effects of Two Different Palatal Expanders on Nasal and Pharyngeal Airway Volumes as Measured by CBCT

et al. 2017

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Objective: To evaluate and compare the effect of memory palatal split screw (Memorax) to that of conventional Hyrax rapid palatal expanders on nasal and pharyngeal airway volumes, which were measured and recorded by Cone beam computed tomography (CBCT). Materials and Methods: This study was conducted over 14 subjects of adolescent patients with bilaterally constricted maxillary arches, the sample contained 12 females and 2 males, with age ranged from 12ys to 15ys, with a mean of 13.6 ± 1.4. The sample was divided into two age matched groups, the Memorax group (N=7) subjects with a mean age of 13.5 ± 0.4, received the memory palatal split screw appliance (Memorax). The Hyrax group (N=7) subjects with a mean of 13.4 ± 1 were received the conventional Hyrax palatal expander. For all subjects taking part in the study, maxillofacial CBCTs and NOSE questionnaire records were taken before expansion (T 1 ) and after 3 months at the time of removal of the expanders (T 2 ). Data were explored for normality using Kolmogorov-Smirnov test of normality. Paired t test was used to compare mean values of before and after treatment. Independent (unpaired) test was used to compare between the two groups. Results: Memorax showed a significant increase in nasal airway volume as well as naso-, palato-and total pharyngeal airway volume. While Hyrax showed a non-significant decrease in the palatopharyngeal airway volume. Both groups showed a non-significant difference in the glossopharyngeal airway volume as well as in the NOSE questionnaire results. Conclusion: Memorax could be used in patients suffered from symptomatic nasal obstruction due to bilateral maxillary constriction, in order to improve their breathing as a primary purpose as well as treating malocclusion. It also may be advantageous because it shortens the maxillary expansion period, provides additional expansion in the retention period and generates light forces relative to the conventional Hyrax screw.

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“…6 Disarticulating these sutures will lead to anatomical changes in the nasal cavity with an increase in the nasal volume, [7][8][9][10][11][12] which decreases the nasal airway resistance, establishes predominant nasal respiration, and improves the nasal airway ventilation. 13,14 This procedure has also been proved to offer an effective method for treating children with obstructive sleep apnea syndrome.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional changes of the naso-maxillary complex following rapid maxillary expansion

Bouserhal

Bassil-Nassif

Tauk³

et al. 2013

The Angle Orthodontist

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Objective: To assess the volumetric changes and the maxillary response of the naso-maxillary complex (NMC) following rapid maxillary expansion (RME). Materials and Methods: Thirty consecutive patients (14 males and 16 females) with a mean age at first observation of 9.5 6 1.8 years for males and of 11.8 6 1.7 years for females, presenting a posterior unilateral or bilateral crossbite and requiring RME, were selected for the study. Each patient underwent expansion to correct the transverse occlusal relationships. Computed tomography scans were taken before RME (T1) and at the end of the active expansion phase (T2). Measurements were performed on scanned images. The Kolmogorov-Smirnov test was performed; the mean differences between measurements at T1 and T2 were compared using the ttest (a 5 .05). Results: All volumetric, maxillary, transverse skeletal anterior and posterior variables as well as all dental anterior and posterior linear and angular variables representing the NMC displayed statistically highly significant increases after RME (P , .001). Conclusions: After RME the total volume of the NMC increased by 12%, the nasal volume by 17%, and the maxillary volume by 10.6%. The maxillary and the nasal contributions represented 69. 75% and 30.25%, respectively. (Angle Orthod. 2014;84:88-95.)

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Three-dimensional computed tomography analysis of airway volume changes after rapid maxillary expansion

Cited by 120 publications

References 25 publications

Three-dimensional computed tomography analysis of airway volume changes between open and closed jaw positions

Three-dimensional computed tomography analysis of airway volume changes between open and closed jaw positions

The Effects of Two Different Palatal Expanders on Nasal and Pharyngeal Airway Volumes as Measured by CBCT

Three-dimensional changes of the naso-maxillary complex following rapid maxillary expansion

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