The Effectiveness of Releasing the Lower Lateral Cartilage Through Intranasal Z-plasty Incision on the Vestibular Web During Secondary Correction of Nasal Deformities in Complete Unilateral Cleft Lip and Palate.

The primary goal in the secondary correction of unilateral cleft lip nose deformity is to achieve symmetry of the nose and nostril. This study aimed to investigate the efficacy of freeing the lower lateral cartilage from the pyriform ligament through an intranasal Z-plasty incision on the vestibular web in adult patients with complete unilateral cleft lip and palate. Thirty-six patients with complete unilateral cleft lip and palate, who underwent open rhinoplasty between August 2014 and December 2021, were identified retrospectively. Five parameters for nose form and nostril symmetry were measured on basal views through 2-dimensional photographic analysis. The patients were divided into subgroups with or without septoplasty. Cleft-to-non-cleft ratios between the Z (13 patients) and non-Z groups (23 patients) were compared using the Mann-Whitney U test. The mean follow-up was 12.9 months (6-31 mo). In the Z group, there were significant differences between the preoperative and postoperative values for nostril angulation, regardless of septoplasty (all P <0.05). Despite septoplasty, significant differences in the postoperative changes in nostril angulation were found between the Z and non-Z groups (all P <0.05). Intranasal Z-plasty on the plica vestibularis is an effective technique for releasing the lower lateral cartilage, improving the nostril asymmetry in cleft lip nose deformity.