Nasal Profile Changes with Le Fort I Maxillary Advancement Surgery

Abstract

Introduction : The purpose of this study was to quantify anteroposterior facial soft tissue changes with respect to underlying skeletal movements after Le Fort I maxillary advancement surgery by using lateral cephalograms taken before and after the operation. Materials and Methods : The study group consisted of 20 patients (10 women, 10 men; mean age 23.4 ± 1.4 years) having a Class III skeletal deformity caused by a retrognathic maxilla. All patients were treated by Le Fort I maxillary advancement osteotomy. Lateral cephalograms were taken before and 1.6 ± 0.4 years after surgery. Results : The anteroposterior position of A-point and anteroposterior position of maxillary incisor were significantly protracted (-2.69 ± 3.34 and -2.68 ± 3.21, respectively; P < .01). The nasal anteroposterior and superoinferior positions (NASALAP and NASALSI, respectively) were significantly changed (-2.70 ± 6.81, P < .01, and -2.55 ± 5.80, P < .05, respectively) and nasal elevation and protraction were observed after Le Fort I maxillary advancement surgery. Conclusions : The changes in anteroposterior and superoinferior positions of A-point were correlated with the nasal superoinferior position (r = -0.71 , P < .05; r = 0.72, P < .05) after Le Fort I maxillary advancement surgery.

Nasalância em indivíduos com deformidades dentofaciais e a influência da cirurgia ortognática

“…A cirurgia ortognática, procedimento muito utilizado para correção das deformidades dentofaciais, modifica as vias aéreas superiores Jakobsone;Stenvik;Espeland, 2011;Mattos et al, 2011;Park et al, 2012;Williams et al, 2013;Chang et al, 2015;Al-Moraissi et al, 2015;Marşan et al, 2015;Karabekmez;Kleinheinz;Jung, 2015;Kochar et al, 2016), portanto, é outro fator que pode trazer mudanças nos escores de nasalância (Haapanen et al, 1997;Ward et al, 2002;Trindade et al, 2003;Van Lierde et al, 2003;Zemann et al, 2006;Smedberg;Neovius;Lohmander, 2014 , 2004), para que a distribuição do fluxo aéreo expiratório e das vibrações acústicas para a cavidade oral e nasal sejam adequadas (Kent, 1997;Camargo;Rodrigues;Avelar, 2001;Pegoraro-Krook et al, 2004;Kummer, 2013).…”

“…nas vias aéreas superioresJakobsone;Stenvik;Espeland, 2011;Mattos et al, 2011;Park et al, 2012;Williams et al, 2013;Chang et al, 2015;Al-Moraissi et al, 2015;Karabekmez;Kleinheinz;Jung, 2015;Marşan et al, 2015;Kochar et al, 2016) Al-Moraissi et al (2015). relataram que a técnica cirúrgica também influencia na mudança do espaço aéreo faríngeo.…”