Avaliação cefalométrica dos efeitos do aparelho de protração mandibular (APM) associado à aparatologia fixa em relação às estruturas esqueléticas em pacientes portadores de má oclusão Classe II, 1ª divisão

Abstract

O r i g i n a l a r t i c l eCephalometric evaluation of the effects of the joint use of a mandibular protraction appliance (MPA) and a fixed orthodontic appliance on the skeletal structures of patients with Angle Class II, division 1 malocclusionObjective: This study aimed to perform a cephalometric evaluation of the skeletal responses triggered by the joint use of a mandibular protraction appliance (MPA) and a fixed orthodontic appliance for correction of Class II, division 1 malocclusion in young Brazilian patients. Methods: The sample consisted of 56 lateral cephalograms of 28 patients (16 women and 12 men). The initial mean age was 13.06 years and mean duration of therapy with MPA was 14.43 months. The lateral radiographs were obtained before and after treatment and were compared by two calibrated examiners to identify the skeletal changes induced by the MPA using 16 linear and angular cephalometric measures. Some independent variables (patient age, sex, facial pattern, MPA model, total use time, archwire and technique used during therapy with MPA) were considered and related to those measures in order to demonstrate the influence of these variables on them. Responses to treatment were analyzed and compared by the Wilcoxon Signed Ranks test and Mann-Whitney test at a significance level of 5%. Results: The results showed restricted anterior displacement of the maxilla, increased mandibular protrusion, improved anteroposterior relationship of the basal bones and stability of the mandibular plane relative to the cranial base. The influence of variables age, facial pattern and MPA type was also noted. Conclusions: MPA proved an effective alternative in the treatment of Class II, division 1 malocclusion, inducing changes in the skeletal component with satisfactory clinical results. AbstractKeywords: Cephalometry. Functional orthodontic appliances. Angle Class II malocclusion. Mandibular protraction appliance.

Relación Entre Los Vectores De Crecimiento Mandibular Anteroposterior Y Vertical Con Talla Y Peso en Niños Entre Dos Y Cuatro Años Usando La Paquimetria Orofacial

“…No obstante, el patrón de crecimiento anteroposterior de la mandíbula es una medida de interés para la valoración de la maloclusión (15), (13), (16) ; toda vez que la relación anteroposterior de estas estructuras sobre el primer molar permite a los clínicos determinar el tipo de oclusión dental (17) .…”