The effect of maxillary advancement and impaction on the upper airway after bimaxillary surgery to correct Class III malocclusion.
Am J Orthod Dentofacial Orthop
; 139(4 Suppl): e369-76, 2011 Apr.
Article
en En
| MEDLINE
| ID: mdl-21435545
AIM: The aim of this study was to evaluate the upper airway changes after simultaneous maxillary advancement/impaction and mandibular setback in skeletal Class III malocclusion. METHODS: The subjects included 76 patients whose treatment included 1-piece LeFort I and bilateral sagittal split osteotomies. Lateral cephalograms were taken before surgery and 2 months and 3 years postoperatively. In order to analyze the effect of maxillary repositioning, the material was divided into subgroups according to whether the maxillary impaction and advancement were clinically significant (≥2 mm) or not. RESULTS: Advancement of the maxilla with or without impaction resulted in a significant long-term increase (P <0.001) in airway dimension at the nasopharyngeal level (13%-21% increase). At the oropharyngeal and retrolingual levels, a decrease took place but was significant (P <0.05) only at the oropharyngeal level when the maxilla was not impacted. When the maxilla was not advanced, there was no significant change, except at the hypopharyngeal level (12% decrease) (P <0.01). CONCLUSIONS: Clinically significant advancement (≥2 mm) of the maxilla significantly increased the airway dimension at the nasopharyngeal level and to some extent compensated for the effect of mandibular setback at the hypopharyngeal level.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Faringe
/
Osteotomía Le Fort
/
Maloclusión de Angle Clase III
/
Maxilar
Límite:
Adolescent
/
Adult
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Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
Am J Orthod Dentofacial Orthop
Asunto de la revista:
ODONTOLOGIA
/
ORTODONTIA
Año:
2011
Tipo del documento:
Article
País de afiliación:
Letonia
Pais de publicación:
Estados Unidos