Quad Helix vs RME for Posterior Cross-bite in Egyptian Children

This randomized clinical trial aims to evaluate and compare the effectiveness of the Quad Helix (QH) appliance versus Rapid Maxillary Expanders (RME) in treating posterior cross-bite in Egyptian children during the mixed dentition stage. The study will also assess patient comfort and pain levels associated with each appliance.

NCT Number	NCT07500194
Lead Sponsor	Al-Azhar University
Conditions	Posterior Crossbite, Maxillary Expansion, Transverse Maxillary Deficiency
Enrollment	20 participants
Start Date	2026-03-30
Primary Completion	2027-12-30 (estimated)
Study Completion	2028-03-31 (estimated)
Updated on ClinicalTrials.gov	2026-03-30