A literature review on the prevalence of the cleft lip and cleft palate (CLCP) is provided. Prevalence of this birth defect in the world is approximately 0.04% or 1:1000 of babies born. It has been shown that dentoalveolar and facial anomalies and deformities remain in the leading positions among dental diseases, such as caries and periodontal diseases. Their prevalence ranges between 11.4% and 80%. Bilateral cleft of the upper lip and palate (BCULP), which is a severe pathology of the maxillofacial region (MFR), accounts for 12-25% of the CLCP cases.
