The current study aimed to examine the effects of the modified tandem
appliance on the dimensions of the airways.
Pretreatment and post-treatment cephalograms of twelve patients with
maxillary deficiency, (7 girls, 5 boys; mean age 8±0.5 years), w
ho were
seeking treatment at the Department of Orthodontics, Damascus
University, were studied. These patients were treated using the modified
tandem appliance with rapid maxillary expansion.