Does rapid maxillary expansion influence cranial base angle? A controlled, retrospective clinical trial.

The aim of this study is to evaluate the changes in sphenooccipital synchondrosis features 1-year after rapid maxillary expansion (RME) therapy, in order to assess the influence that these changes, if any, have on sagittal and vertical skeletal cephalometric variables. The results of this study indicated that RME had statically significant effect on sphenooccipital synchondrosis. Regarding the cephalometric analysis, these changes seem to be not significant on vertical and sagittal planes.