Relationships among tongue volume, hyoid position, airway volume and maxillofacial form in paediatric patients with Class-I, Class-II and Class-III malocclusions.
Orthod Craniofac Res
; 22(1): 9-15, 2019 Feb.
Article
en En
| MEDLINE
| ID: mdl-30421852
ABSTRACT
OBJECTIVES:
To clarify the associations among tongue volume, hyoid position, airway volume and maxillofacial form using cone beam computed tomography (CBCT) data for children with Class-I, Class-II and Class-III malocclusion. SETTING AND SAMPLE POPULATION Sixty children (mean age, 9.2 years) divided into Class-I, Class-II and Class-III malocclusion groups according to the A-nasion-B angle. MATERIAL ANDMETHODS:
Cone beam computed tomography was used for three-dimensional reconstruction of the maxillofacial region and airway. The hyoid position and the tongue, airway and oral cavity volumes were evaluated. Upper airway ventilation status was calculated using computational fluid dynamics. The groups were compared using analysis of variance and Kruskal-Wallis tests; relationships among the parameters were assessed using Pearson's and Spearman's rank correlation tests.RESULTS:
The tongue volume was larger in Class-III patients (50.63 cm3 ) than in Class-I patients (44.24 cm3 ; P < 0.05). The hyoid position was lower (49.44 cm), and anatomical balance (AB; tongue volume/oral cavity volume; 85.06%) was greater in Class-II patients than in Class-I patients (46.06 cm, 80.57%, respectively; P < 0.05 for both). The hyoid height showed a positive correlation with AB (r = 0.614; P < 0.001).CONCLUSIONS:
Children with Class-III malocclusion have large tongue volumes and small AB; the reverse is true for children with Class-II malocclusion. The hyoid position is closely associated with AB in children with malocclusion.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Lengua
/
Nasofaringe
/
Hueso Hioides
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Maloclusión Clase I de Angle
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Maloclusión Clase II de Angle
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Maloclusión de Angle Clase III
Tipo de estudio:
Observational_studies
/
Risk_factors_studies
Límite:
Child
/
Female
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Humans
/
Male
Idioma:
En
Revista:
Orthod Craniofac Res
Asunto de la revista:
ODONTOLOGIA
/
ORTODONTIA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Japón