The Impact of Alar Flare Reduction Goes Beyond Just the Ala.

Abstract

Alar flare reduction (AFR) is a widely used technique in rhinoplasty. Although the impact of AFR on the alar base has been well studied, its effect on the surrounding tissues is largely unknown. This study aims to elucidate the potential effect of AFR on the overall nasal and perinasal anatomy. AFR was performed on cadavers ( n = 7) with sequential crescent-shaped alar excisions of 2, 4, and 6 mm. Two- and three-dimensional photographs were obtained at baseline and subsequent intervals. Analysis was performed with Adobe Photoshop and Vectra. Standardized landmarks were placed at the nasal tip point (NTP) and alar base point to quantify NTP vector distances, NTP surface distances, and alar crease angle. The surface and vector distances between the NTP and alar base point decreased for increasing AFR intervals. AFR created a surface decrease of 1.90 ± 1.60, 3.54 ± 1.85, and 4.91 ± 1.89 mm, respectively. AFR created a vector decrease of 1.50 ± 1.14, 2.83 ± 1.37, and 3.97 ± 1.38 mm, respectively. NTP projection decreased by 0.54 ± 0.31 mm for 6-mm excision. AFR led to cheek elevation of 0.87 ± 0.70, 1.25 ± 0.60, and 1.96 ± 0.48 mm, respectively. This alar crease elevation blunted the transition between the cheek and upper lip skin at the level of the alar rim with the angle of this transition increasing 26.62 ± 12.78 degrees from baseline to 6 mm. Three-dimensional analysis demonstrates the influence of AFR on the alar base and surrounding perinasal contour. AFR results in nasal tip deprojection, alar crease elevation, and alar flare width narrowing. Further investigation into the impact of modifying the alar base on surrounding structures is warranted.