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Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
EISSN:
Vol. 11, No. 3, 2012, pp. 368-372
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Bioline Code: os12034
Full paper language: English
Document type: Research Article
Document available free of charge
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Brazilian Journal of Oral Sciences, Vol. 11, No. 3, 2012, pp. 368-372
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Influence of wrong determination of occlusal plane in maxillary advancement: a model surgery study
Maliska, Maximiana Cristina de Souza; Garcia, Robson & Moreira, Roger Willian Fernandes
Abstract
Aim: This study investigated whether an occlusal plane error of acquisition can influence on the
treatment planning of maxillary advancement in double-jaw surgeries. Methods: Advancement
of 8 and 4 mm were studied in different groups. For each group, 20 maxillary models were
mounted by a 13-degree platform with superior articulator arm (control group) and other 20
models mounted with 7 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 postoperatively
by digital caliper rule and Erickson’s platform. Results: Statistical analysis showed
significant results in two 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). Conclusions: Notwithstanding the importance of statistical findings, the result probably
did not show clinical relevance in orthognathic surgery. Clinical studies addressing these concerns
must be supplied in scientific literature.
Keywords
occlusal plane, bimaxillary surgery, face bow, model surgery
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© Copyright 2012 - Braz J Oral Sci. Alternative site location: http://www.fop.unicamp.br/brjorals
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