Diced costal cartilage graft combined with muscle repositioning improves Cleft-Side Alar asymmetry in Asian secondary unilateral cleft rhinoplasty: A three-dimensional evaluation

Abstract

Asymmetry in a retrusive cleft-side ala situated posterior, lateral, and/or inferior to the non-cleft ala is aggravated by ipsilateral defect of the pyriform aperture. This study assessed diced costal cartilage graft combined with muscle repositioning in enhancing structural base and alar symmetry in secondary cleft rhinoplasty. From 2016 to 2019, 20 consecutive patients who underwent pyriform aperture paranasal augmentation combined with muscle repair secondary unilateral cleft rhinoplasty were reviewed retrospectively. Clinical three-dimensional (3D) photos were analyzed pre- and postoperatively, and the augmentation method and muscle repositioning were described detailedly. Twenty cases aged 22.2 ± 3.9 years were submitted to secondary cleft rhinoplasty with diced costal cartilage graft to the pyriform rim. They were followed up for 6.2-26.2 months, with postsurgical time averaging 10.3 ± 3.4 months. After total lip takedown by anatomic muscle re-approximation, the cleft to non-cleft side showed enhanced alar symmetry (p<0.001) and heightened vertical lip length (p<0.001). Additionally, the alar base inclination was improved toward the horizontal plane (p<0.001). The cleft-side ala was anatomically ameliorated after muscle repositioning combined with diced costal cartilage graft to the pyriform rim, improving alar symmetry. Complications were minimal, indicating the safety of this method.