Efficiency of Two Maxillary Expanders for Maxillary Arch Expansion in Bilateral Cleft Lip and Palate Patients

Inclusion Criteria: * Patients with age ranging from 8 to 15 years old. * Patients with bilateral cleft lip and palate. * Patients with repaired cleft lip and / or palate. * Patients with fully erupted upper permanent 1st molars. * Patients in the late mixed or early permanent dentition with tapered maxillary arch, requiring palatal expansion as part of their treatment. * Patient's stage of cervical vertebral maturation before or at the growth spurt (CS1-CS4). Exclusion Criteria: * Patients with syndromic cleft lip and palate. * Patients with very bad oral hygiene and active periodontal disease. * Vulnerable groups