This study aims to evaluate the Skeletal and Dento-alveolar expansion in adult patents using Four Mini-screws Supported Hyrax in compare with untreated control group.
Aim of the study: To evaluate the Effectiveness of Four Mini-screws Supported Hyrax for Maxillary Expansion in Early Adulthood Methodology: * Essential record for orthodontic treatment will be taken. * impression with bands on upper first molars will be taken. * Four eyelets will be soldered to the body of the hyrax appliance (size 10, Dentaurum, Germany). * CBCT will be taken while patient wearing 1 mm thickness vacuum on the lower arch to dis-occlude both arches. * Delivery, check the retention and fitness of the appliance. * The appliance will be cemented using band cement(compomer). * Using 3M contra-angle driver, the screws (Tomas screw size 10, Dentaurum, Germany) will be loaded and inserted. * Activation of the appliance by opening it two turns immediately, followed by two turns everyday till cross bite correction or appearance of midline diastema. * Closure of the device, and leave the appliance in-situ for five months as a retention. * Post-expansion CBCT will be taken and continue fixed orthodontic treatment. Outcome: skeletal and dento-alveolar expansion will be evaluated
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
24
these patents will be treated using Four mini-screws supported hybrid hyrax
Faculty of Dentistry, Cairo university
Cairo, Giza Governorate, Egypt
Skeletal maxillary expansion
To compare the amount of skeletal expansion pre and post expansion
Time frame: 5 months interval between pre and post-expansion
Dento-alaveolar expansion
To compare the amount of Dento-alaveolar expansion pre and post expansion
Time frame: 5 months interval between pre and post-expansion
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