Abstract
There is an agreement among orthodontists that a posterior crossbite relationship
should be treated early. The Haas expansion appliance is frequently chosen whenever
a maxillary skeletal constriction exists in the deciduous, mixed, or permanent dentition.
In this study we evaluated the efficacy of rapid maxillary expansion for 32 children
between 5 and 11 years of age, by inspection of anteroposterior radiographs. Our results
confirm previous data in the literature that the triangular opening in the frontal
alveolar area is greater than in other parts of the midpalatal suture. It is evident
that with expansion there is a real orthodontic effect, even at an early age. (AM J ORTHOD DENTOFAC ORTHOP 1995;107:268-75.)
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© 1997 Published by Elsevier Inc.
