Assessment of facial profile changes in Class I biprotrusion adolescent subjects submitted to orthodontic treatment with extractions of four premolars

AUTOR(ES)

Mattos, Claudia Trindade, Marquezan, Mariana, Chaves, Isa Beatriz Barroso Magno, Martins, Diogo Gonçalves dos Santos, Nojima, Lincoln Issamu, Nojima, Matilde da Cunha Gonçalves

FONTE

Dental Press Journal of Orthodontics

DATA DE PUBLICAÇÃO

2012-06

RESUMO

OBJECTIVE: To evaluate cephalometric changes in tooth and profile position in young adolescent individuals with Class I biprotrusion submitted to orthodontic treatment with extractions of four first premolars. METHODS: Pre and posttreatment lateral cephalometric radiographs from 20 patients with Class I biprotrusion malocclusion were used to evaluate the following measurements: nasolabial angle, distance from lips to E line, distance from lips, incisors, tip of the nose and soft tissue pogonion to Sy line. RESULTS: All measurements showed significant changes after treatment (p<0.05), except the distance from lips and soft tissue pogonion to Sy line. There was a positive correlation between the retraction of incisors and the change of upper and lower lips (0.803/0.925; p<0.001). CONCLUSION: The profile retrusion observed occurred more due to nose growth than to lips retraction. The response from soft tissues to incisors retraction showed a great variability.

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