Evaluate the effectiveness of the use of cheek Flap in the closure of the vestibular oro-nasal fistulas and alveolar clefts

vestibular oro-nasal fistulas and alveolar clefts associate with cleft lip and palate. Sliding flaps are the most used flaps and often the sole method for closure of vestibular oro-nasal fistulas and alveolar clefts. cheek flap can be used instead of Sliding flaps.