The craniofacial orthodontist who is part of the multidisciplinary team evaluating children with cleft lip and palate plays an important role in examining the development of dental occlusion. Early surgical interventions in children with cleft lip and palate frequently cause occlusion disorders with a prevalence of anterior crossbite in 62%. The expansion of the maxilla is important for normalizing the morphology and correct symmetrical tooth eruption. The aim is to evaluate the evolution of maxillary expansion in patients with cleft lip and palate.