Anatomical Reconstruction of the Nasal Floor in Complete Unilateral Cleft Lip Repair

Background: Numerous methods exist for repairing unilateral cleft lips and mainly focus on cutaneous design to achieve sufficient rotation of the medial (M) cleft lip and produce a natural Cupid's bow and philtrum. However, precise nasal floor reconstruction has not been described in detail. This is the first study to introduce a technique for repairing complete unilateral cleft lips with a focus on nasal floor reconstruction. Methods: In our technique, "Straight-Line Advanced Release Technique (StART)," the nasal floor is considered a 3-dimensional cuboid structure; the M mucosal and lateral (L) mucosal flaps constituted the posterior surface. The M flap became the roof of the orbicularis oris muscle sling and the posterior side of the nasal lining. The B flap met the L lip flap at the superior border of the M flap, and together they formed the roof and anterior surface. The B flap also formed a transitional zone connecting the columella and nasal floor. Results: Seventy-two patients with complete unilateral cleft lip were treated from 2003 to 2015. The difference in the height of the nostril sills between the cleft and non-cleft sides was not significantly different from that in control patients (P = 0.472) 1 year postoperatively. Twenty operations for secondary deformities were performed: 8 for nose deformities not involving the nasal floor. The transverse scar at the alar base was concealed within the nostril. Conclusions: Nasal floor reconstruction is important in complete unilateral cleft lip repair. Our technique provides a naturally shaped, symmetrical nasal floor without conspicuous scarring.

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