left lip (CL) and cleft palate (CP) are facial malformations of the upper lip or palate that are the fourth most common congenital abnormality in the United States. They may appear separately or, more commonly, together. The malformation is a result of a failure of the maxillary and median nasal processes to fuse during the second month of embryonic development. CL may
238 Cleft Lip; Cleft Palate vary from a small notch to a complete cleft that extends into the base of the nose. When CP occurs alone, it is midline, but when it occurs with CL, it may extend into either side of the soft palate. Related complications of CL/CP include dental malformations, frequent otitis media leading to hearing impairment, speech difficulties, and social isolation due to poor self-image and speech impairments.
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