To study the features of the development of deformation of the upper jaw after palate surgery in children with congenital unilateral through cleft lip and palate using the method of L.E. Frolov and E.U. Mahkamova.Research objectives.1) To study the features of the development of deformation of the upper jaw after one-stage uranoplasty with the cutting of a mucoperiosteal flap from both jaw fragments.2) To study the features of the development of deformation of the upper jaw during two-stage uranoplasty after plastic surgery of the anterior part of the hard palate with a unilateral mucoperiosteal flap.3) To study the features of the development of deformation of the upper jaw during two-stage uranoplasty after plastic surgery of the anterior part of the hard palate with an inverted mucoperiosteal flap.Scientific novelty.Based on a complex of biometric and graphic studies, a comparative analysis of the severity of deformations of the upper jaw occurring after uranoplasty using various methods is carried out.