Formation of philtral column using vertical interdigitation of orbicularis oris muscle flaps in secondary cleft lip

The philtrum in the lip has an important aesthetic significance and is a mark of individual distinction. For patients who have undergone cleft lip surgery, the construction of the philtrum is crucial for restoring a normal appearance to the upper lip. A total of 13 patients with unilateral cleft lip nose deformities were treated for the creation of a philtral column between January of 1998 and February of 1999. Eight of the patients were male and five were female with an age range of 10 to 40 years old. The scar on the philtral column is excised and a full-thickness incision is made down to the orbicularis oris muscle and mucosa. The medial and lateral muscle flaps are then exposed and split into two leaves. The two leaves of each muscle flap are sutured together to create a vertical interdigitation. Any excess skin is not excised but rather closed with 7-0 nylon. The follow-up period ranged from 6 to 15 months, with an average of 10 months. Ten of 13 patients were satisfied with their good surgical results. Two had fair results. One patient experienced a widening of the scar and no improvement in the philtral column. A possible cause for this lack of improvement was a partial disruption of the interdigitated muscle flaps due to the early active movement of the muscle before wound healing. In conclusion, the advantages of this procedure include the creation of an anatomically natural philtrum through preserving the continuity and function of the muscle, sufficient augmentation of the philtral column by the vertical interdigitation of the muscle, relief of skin tension, and no donor-site morbidity.