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Dento-skeletal effects of mixed palatal expansion evaluated by postero-anterior cephalometric analysis
V Grassia1, F D'Apuzzo1, V E Ferrulli1
1Department of Orthodontics, Second University of Naples, Italy.
Aim:
The aim of this study was to evaluate the dento-skeletal effects of mixed palatal expansion (MPE) on growing patients with a uni- or bilateral posterior crossbite and mild-to-moderate crowding as compared to untreated growing individuals using postero- anterior (PA) cephalometric analysis.
Materials And Methods:
A group of 24 patients (18 girls and 6 boys) treated with a Hyrax- type device was compared to an untreated matched control group at T0 (8.6 yrs ± 2.01) and T1 (10 yrs ± 2.00) using PA cephalograms. The cephalometric analysis included eight bilateral skeletal and dental landmarks. The groups were compared using independent sample t-test to estimate dento-skeletal effects on PA cephalograms.
Results:
The treated group showed significant changes for the maxillary width (P<0.001) and upper molar width (P<0.001) when compared to those of the control group.
Conclusion:
MPE may effectively increase transverse dimensions and correct posterior crossbites.
