Cleft lip and cleft palate are both congenital malformations of the oral and maxillofacial development, and the two conditions are collectively referred to as cleft mouth deformities. Although cleft lip is often associated with cleft palate, there are differences in the mechanisms of cleft lip and cleft palate, with cleft lip being the result of impaired fusion of the facial processes and cleft palate being the result of impaired fusion of the palatal processes.
Cleft lip mainly affects the appearance of the nose and lips and is often accompanied by cleft alveolus, while cleft palate mainly leads to the communication of the oral and nasal cavities, affecting speech function and jaw development.
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