This study was carried out to investigate the prevalence of malocclusion in the primary and early mixed dentition for a group of Egyptian children with complete unilateral cleft lip and palate following surgical rep. air of the anomaly. The material consisted of 35 children (20 males and 15 females) with complete unilateral cleft lip and palate aged 3 to 7 years who were compared with 60 non-cleft Egyptian children (37 males and 23 female) of the same age.