Avaliação rotacional mandibular após os efeitos da disjunção rápida da sutura palatina mediana
2010
The studies concerning the rapid expansion of the median
palatine suture, by using some appliances that expand
the maxillary dental arch, show that the maxilla
moves downward and forward, causing alterations in
the occlusion, such as anterior bite opening and an
increase of the angles of the occlusal and mandibular
planes values. This study aimed at evaluating the alterations
after the rapid maxillary expansion by using
two types of expanders (Haas – GI and Hyrax – GII).
The sample consisted of 93 lateral cephalometric radiographs
from 31 Brazilian individuals (15 females and
16 males) between 9 and 16 years of age (mean age
13 years and 2 months). Radiographs were taken from
each individual in the pre-expansion, immediately after
expansion, and at the conclusion of the leveling stage.
Angle measurements PP.GoMe, NBa. GoMe and NS.Gn
showed a statistically significant increase in the pre-expansion
and the leveling stages in both groups. The clockwise,
downward and back rotational displacement of
the mandible was verified by the statistically significant
increase in the angle measurements studied in the postexpansion
stage, remaining in the final leveling stage
for both groups.
Key words: Orthodontics. Palatal expansion technique.
Orthodontics corrective.
Keywords:
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