Upper airway changes after Xbow appliance therapy evaluated with cone beam computed tomography

Erbaş, Banu; Kocadereli, İlken

doi:10.2319/072213-533.1

Cited by 26 publications

(11 citation statements)

References 20 publications

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“…In this study, we observed no significant changes in the inferior airway space and nasopharyngeal depth. In this regard, our results are comparable with those reported by Jena et al, 18 Han et al 28 and Erbas 29 who evaluated the effects of CTB and MPA-IV, Bionator and Xbow on airway dimensions.…”

Section: Discussionsupporting

confidence: 91%

Effect of Clark's twin-block appliance (CTB) and non-extraction fixed mechano-therapy on the pharyngeal dimensions of growing children

Ali

Shaikh

Fida

2015

Dental Press J. Orthod.

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Introduction: Narrow airway dimensions due to mandibular deficiency can predispose an individual to severe respiratory distress. Hence, treatment with mandibular advancement devices at an early age might help improving the pharyngeal passage and reduce the risk of respiratory difficulties. Therefore, the aim of the current study was to evaluate the mean changes in the pharyngeal dimensions of children with mandibular deficiency treated with Clark's twin-block appliance (CTB) followed by fixed orthodontic treatment. Methods: Orthodontic records of 42 children with mandibular deficiency were selected. Records comprised three lateral cephalograms taken at the start of CTB treatment, after CTB removal and at the end of fixed appliance treatment, and were compared with 32 controls from the Bolton-Brush study. Friedman test was used to compare pre-treatment, mid-treatment and post-treatment pharyngeal dimensions. Wilcoxon signed rank test was used to compare the airway between pre-treatment and post follow-up controls. Mann-Whitney U test was applied to compare the mean changes in pharyngeal dimensions between treatment group and controls from T2 to T0. Post-hoc Dunnet T3 test was used for multiple comparisons of treatment outcomes after CTB and fixed appliances, taking a p-value of ≤ 0.05 as statistically significant. Results: Superior pharyngeal space (p < 0.001) and upper airway thickness (p = 0.035) were significantly increased after CTB, and the change in superior pharyngeal space remained stable after fixed mechano-therapy. Conclusion: CTB can have a positive effect in improving pharyngeal space and the resultant increase in airway remains stable on an average of two and a half years.

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Section: Discussionsupporting

confidence: 91%

Effect of Clark's twin-block appliance (CTB) and non-extraction fixed mechano-therapy on the pharyngeal dimensions of growing children

Ali

Shaikh

Fida

2015

Dental Press J. Orthod.

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“…These resultsconcur with Isidor et al (24) who used monoblock and Twin-Block removable functional appliancesandreported a significant increase of 2500 mm 3 in the total pharyngeal airway. Likewise, these finding are in harmony with those of other studies (21,27) who utilized somewhat different FFAs and accomplished enhancement in the pharyngeal airway volume via CBCT. Rizk et al (21) utilized MARA appliance and reportedan increase of 2200 mm 3 while Erbas et al (27) showed increase 1700 mm 3 following X-bow Forsus appliance Although there is continuous debate regarding the effectiveness of FFAs for stimulating the mandibular growth, several reports have demonstrated successful corrections of skeletal Class II through the Herbst appliance in growing patients (2,8) .Even if there was an incremental skeletal enhancement with the rigid types of FFAs (e.g.…”

Section: Discussionsupporting

confidence: 88%

“…The vertical anterior boundary of pharyngeal airway was represented by the line P4 which is perpendicular to FHP and tangent to PNS (Fig. 4) (24,27) . The airway volumetric analysis was performed using the "the airway analysis" module of the software.…”

Section: Pharyngeal Airway Assessmentmentioning

confidence: 99%

Three-Dimensional Evaluation of Pharyngeal Airway Volume Following Treatment of Post-Pubertal Patients with Skeletal Class II Malocclusion via Miniplate-Anchored Herbst Appliance

2020

Al-Azhar Journal of Dental Science

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“…Additionally, Zhang et al [21] and Shete and Bhad [22] reported that TB appliance may improve the obstructive sleep apnea (OSA) symptoms in patients with mandibular retrognathia. Generally, the pharyngeal airway dimension changes following functional therapy were examined through two-dimensional (2D) lateral cephalograms [23][24][25] or 2D cephalometry extracted from cone beam computed tomography (CBCT) [26,27]. However, because of its 2D nature and inability to provide volumetric data, the value of lateral cephalograms is limited in the studies concerning the airway.…”

Section: Introductionmentioning

confidence: 99%

Volumetric Evaluation of Pharyngeal Airway after Functional Therapy

Yıldırım¹,

Karaçay²

2021

Scanning

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The aim of this study was to evaluate three-dimensional (3D) effects of Twin-block functional appliance (TB) on the pharyngeal airway by using cone beam computed tomography (CBCT). A total of 30 patients (14 females, 16 males; mean age 12.50 ± 1.23 and 12.83 ± 1.17 years, respectively) with skeletal Class II malocclusion were included in this study and were treated with TB. On the pretreatment (T1) and posttreatment (T2) CBCT scans, volumetric changes in the pharyngeal airway; SNA, SNB, and ANB angles; and bilateral effective mandibular (Co-Gn) and midfacial length (Co-A) were also evaluated. The statistical differences were accessed by Wilcoxon signed-rank tests, and Mann-Whitney U tests were used to analyze the scores of male and female subjects. In this study, an increase was observed in SNB and Co-Gn ( p < 0.01 ) while a decrease in ANB and SNA ( p < 0.01 and p < 0.05 , respectively) was found. However, increase in midfacial length was not statistically significant ( p > 0.05 ). In the evaluation of volumetric pharyngeal airway changes, statistically significant increases ( p < 0.01 ) in the upper and lower division and total airway volume were determined. Gender differences were insignificant for all measurements ( p > 0.05 ). Volumetric changes in the pharyngeal airway after functional therapy can be successfully evaluated by CBCT images. The anterior repositioning of the mandible by TB increases the mandibular length and pharyngeal airway volume in patients with retrognathic mandible.

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Upper airway changes after Xbow appliance therapy evaluated with cone beam computed tomography

Abstract: Treatment with the Xbow appliance in Class II patients resulted in favorable increase in the oropharyngeal airway dimensions and volume. Further studies with larger study samples and with control groups are needed.

Cited by 26 publications

References 20 publications

Effect of Clark's twin-block appliance (CTB) and non-extraction fixed mechano-therapy on the pharyngeal dimensions of growing children

Effect of Clark's twin-block appliance (CTB) and non-extraction fixed mechano-therapy on the pharyngeal dimensions of growing children

Three-Dimensional Evaluation of Pharyngeal Airway Volume Following Treatment of Post-Pubertal Patients with Skeletal Class II Malocclusion via Miniplate-Anchored Herbst Appliance

Volumetric Evaluation of Pharyngeal Airway after Functional Therapy

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