Análise cefalométrica respiratória de crianças em fase de dentição mista portadoras de má-oclusão Classe II divisão 1ª com retrognatismo mandibular

Resumo (EN)

Introduction – The epigenetics factors influence in the normal growth of the skeletal structures resulting in significant alterations of the complex facial. A deficient breathing function involves a series of adaptations tongue posture, lip, jaw and head causing differentiation morphologics craniofacial. The present study had as purpose to measure and to analyse the space nasopharyngeal of children bearers of malocclusion Class II division 1st of Angle with mandibular retrognatism as component. Material and Methods – Twenty five lateral cephalometrics were selected in children’s lateral norm in phase of mixed dentition in the age group from 7 to 12 years. The classification of the skeletal pattern was obtained according to McNamara’s Cephalometric analysis differentiating the components skeletal maxillary and mandibular in relation to the base of the cranium through the Vertical Plane perpendicular N-Perp to the Frankfurt plane and the cephalometric points “A” of Downs and morphologic Pogonius. The nasopharyngeal dimensions were measured following the parameters of Ricketts (1954) and of Linder-Aronson (1976) for the anteroposterior and superolower dimensions with base in the adenoid tissue. Results – The obtained results demonstrated that 80% of the analysed patients didn’t present nasopharyngeal obstruction, however 20% of those patient ones presented alterations of this space. Conclusion – Demonstrating this the need of treatment orthodontics precocious and multidiscipline of these patient ones.