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Type: Artigo de periódico
Title: Assessment Of The Nasolabial Angle After Orthodontic Treatment With And Without Extraction Of The First Premolars [avaliação Do ângulo Nasolabial Após O Tratamento Ortodôntico Com E Sem Extração Dos Primeiros Pré-molares]
Author: de Almeida F.M.
Neves I.S.
Pereira T.J.
de Siqueira V.C.V.
Abstract: Aim: To cephalometrically evaluate the changes in the nasolabial angle of the patients submitted to orthodontic treatment with and without extractions and correlate them with upper incisor inclination, upper lip position and the base of the nose. Methods: The sample was composed of pre and posttreatment lateral cephalometric records of 30 female patients with Class II division 1 malocclusion. Fifteen were treated with first premolars extractions and the other fifteen without extractions. The following parameters were measured: nasolabial angle; upper incisor inclination (Is.SN7° angle), upper lip position (Ls-PCm.SN7° angle) and base of the nose (PCm.SN7° angle). Results: The upper incisor inclination and the upper lip position showed a statistically significant increase from T0 to T1 in the extraction group. No statistically significant differences were found for the other parameters in both groups. The correlations between upper lip position, base of the nose and the nasolabial angle were positive. Conclusion: 1) There was a significant increase in the nasolabial angle in the extraction group and it was mainly due to changes in the upper lip position; 2) nasal growth during the study period did not contributed to the nasolabial angle increase; 3) all measurements were not statistically different between the 2 groups at T0 and T1, and 4) a positive correlation was found between the nasolabial angle, lip position and base of the nose in both groups.
Rights: fechado
Identifier DOI: 
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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