Evaluation and measurement of midpalatal suture through the digitalized occlusal radiography in patients submitted to rapid maxillary expansion

Sandra Maria Nobre DAVID, Julio Cezar de Melo CASTILHO, Cristina Lucia Feijó ORTOLANI, Antonio Francisco DAVID, Luiz Roberto Coutinho MANHÃES JUNIOR, Roberto Hiroshi MATSUI

Aim: to evaluate and to measure the midpalatal suture through digitalized occlusal radiographies before and after its disjunction. Methods: The sample was comprised by 17 patients, with ages from 7 to 22 years. Occlusal radiographies of these patients were obtained before and after the suture´s opening. The occlusal radiographies were digitalized in a HP Scanjet 6100 C scanner with the HPC 6261 6100 C transparencies adaptor and the Deskscan II software. The statistical analysis used average, standard deviation, variation coeffi cient, “t” test and ANOVA. Conclusions: After the results, it was possible to conclude that: (1) statistically, there was a significant midpalatal opening in the incisors area; (2) there was an opening in the diastema between upper central incisors in about 69.37% of the cases; (3) there was a bigger midpalatal suture opening in the 10mm area from the crest to posterior than in the 3mm area to posterior from the screw; (4) in the 3mm area to posterior from the screw there was an opening of 35.97% and in the 10mm area to posterior of the crest there was an opening of 69.37%.

Keywords: Disjunction. Midpalatal suture. Digitalized radiography.

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