Herbst appliance effects on pharyngeal airway ventilation evaluated using computational fluid dynamics.
Angle Orthod
; 87(3): 397-403, 2017 May.
Article
en En
| MEDLINE
| ID: mdl-28121164
ABSTRACT
OBJECTIVE:
To evaluate the effect of a Herbst appliance on ventilation of the pharyngeal airway (PA) using computational fluid dynamics (CFD). MATERIALS ANDMETHODS:
Twenty-one Class II patients (10 boys; mean age, 11.7 years) who required Herbst therapy with edgewise treatment underwent cone-beam computed tomography (CBCT) before and after treatment. Nineteen Class I control patients (8 boys; mean age, 11.9 years) received edgewise treatment alone. The pressure and velocity of the PA were compared between the groups using CFD based on three-dimensional CBCT images of the PA.RESULTS:
The change in oropharyngeal airway velocity in the Herbst group (1.95 m/s) was significantly larger than that in the control group (0.67 m/s). Similarly, the decrease in laryngopharyngeal airway velocity in the Herbst group (1.37 m/s) was significantly larger than that in the control group (0.57 m/s).CONCLUSION:
The Herbst appliance improves ventilation of the oropharyngeal and laryngopharyngeal airways. These results may provide a useful assessment of obstructive sleep apnea treatment during growth.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Faringe
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Aparatos Ortodóncicos Funcionales
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Tomografía Computarizada de Haz Cónico
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Maloclusión Clase II de Angle
Límite:
Child
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Female
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Humans
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Male
Idioma:
En
Revista:
Angle Orthod
Año:
2017
Tipo del documento:
Article