Importância da obtenção do plano oclusal com arco facial para planejamento do avanço maxilar em cirurgias ortognáticas bimaxilares / Influence of wrong determination of occlusal plane in maxillary advancement : a model surgery study

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

29/03/2012

RESUMO

This study investigated whether an occlusal plane error of acquisition can influence in the treatment planning and result of maxillary advancement in double-jaw surgeries. Advancement of 8 and 4 millimeters were studied in different groups. For each group 20 maxillary models were mounted by a 13 degrees platform with superior articulator arm (control group) and another 20 models mounted with minus 6 degrees (study group). Intermediate splint was obtained by cast surgery performed in the control group. All the 40 maxillary models were remounted with this intermediate splint. Measurements in vertical and anteroposterior planes were accomplished pre and post-operatively by digital caliper rule and Erickson s platform. Statistical analysis showed significant results in all planes. The alteration of occlusal plane from 13 degrees to 7 degrees modified the final result in vertical measurements: right molar from group of 4 mm advancement (p<0.0001) and left molar from two groups of advancement (p<0.0001); in anteroposterior measurements: maxillary incisor from 4 mm of advancement (p<0.005) and 8 mm of advancement (p<0.0001). Notwithstanding the importance of statistical findings, this study was limited by a range of 4 mm of advancement and a range of 6 degrees of angle alteration because the sample were chosen by the laboratorial methodology. Clinical studies evolving these questions must be supplied in scientific literature.

ASSUNTO(S)

cirurgia ortognática desenvolvimento maxilofacial dentição sistema estomatognatico maxillofacial development dentition stomatognathic system orthognathic surgery

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