Avaliação das alterações esqueletais em pacientes submetidos à expansão
rápida da maxila por meio de osteotomia Le Fort I: estudo cefalométrico em norma frontal

NERONE, Luiz Antonio Nerone; MÜLLER, Paulo Roberto Müller; REBELLATO, Nelson Luis Barbosa Rebellato; DA COSTA, Delson João da Costa

Original Article

Avaliação das alterações esqueletais em pacientes submetidos à expansão rápida da maxila por meio de osteotomia Le Fort I: estudo cefalométrico em norma frontal

Evaluation of skeletal changes in patients submited to rapid maxillary expansion by LeFort I osteotomy: a posteroanterior cephalometric evaluation

NERONE, Luiz Antonio Nerone; MÜLLER, Paulo Roberto Müller; REBELLATO, Nelson Luis Barbosa Rebellato; DA COSTA, Delson João da Costa

Rev. odontol. UNESP, vol.38, n4, p.217-221, 2009

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Resumo

O objetivo deste trabalho consiste na avaliação das alterações esqueletais ocorridas após a expansão rápida da maxila (ERM) por meio de osteotomia Le Fort I. Foram realizadas cefalometrias em norma frontal, pré e pós-operatórias, de 13 pacientes com deficiência transversal de maxila. As variáveis mensuradas foram largura maxilar efetiva e largura da abertura piriforme. Foram estabelecidas as distâncias (pré e pós-operatórias) entre os pontos Maxillare direito e esquerdo, para a largura maxilar, e Lateronasal direito e esquerdo, para a largura da abertura piriforme. Para a comprovação dos objetivos propostos neste trabalho, foram utilizados o Coeficiente de Correlação de Pearson e os testes paramétricos "t-Student". Houve um incremento médio de 4,1% na largura da abertura piriforme e de 3,8% na largura efetiva da maxila. Concluiu-se que após a ERM, ocorre um aumento na largura maxilar efetiva e na largura da abertura piriforme. Após a ERM, manteve-se uma correlação entre a largura da abertura piriforme e a largura maxilar posterior, como havia na fase pré-operatória, o que sugere que houve liberação das áreas de resistência pelas osteotomias empregadas.

Palavras-chave

Osteotomia de Le Fort, técnica de expansão palatina, efeitos adversos, radiografia.

Abstract

The goal of this study is evaluate the skeletal changes that occurred after the rapid maxillary expansion (RME) through Le Fort I osteotomy. Posteroanterior cephalometries were held, pre and post-operative, in 13 patients with transversal maxillary deficiency. The variables measured were the effective maxillary width and nasal width. The distances – pre and postoperative - between right and left Maxillare points, to the maxillary width, and right and left Lateronasal points, to the nasal width, were established. For proof of the goals raised in this work were used the Pearson’s correlation coefficient and the "t-Student" parametric test. There was an average increase of 4.1% in the nasal width and 3.8% in the effective maxillary width. It was concluded that after the RME occur an increase in the nasal and effective maxillary width. After the RME has remained a correlation between the nasal width and the posterior maxillary width, as there was in the pre-operative, suggesting that there was a release of resistance areas by employed osteotomies.

Keywords

Osteotomy, Le Fort, palatal expansion technique, adverse effects, radiography

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