Folded Cymba Concha: Is It Large and Stable Enough for Caudal Septal Extension Graft in Asian Rhinoplasty?

Abstract

Septal extension grafting (SEG) is used for nasal tip projection and positioning. Often, insufficient quadrangular cartilage is available for grafting in Asians and in most secondary cases, the septum is already harvested. We utilized the folded cymba concha as an alternative for caudal SEG (CSEG) by modifying a tongue-in-groove technique. To evaluate the physical validity of the cymba concha for CSEG and compare its outcomes with those of septal quadrangular cartilage. The mean length and width of 311 harvested consecutive folded cymba conchae were measured from intraoperative photographs. Data from 220 patients with >12 months of follow-up were retrospectively reviewed for clinical outcomes. Clinical demography was determined based on the need for additional spreader grafts. For clinical reliability, anthropometric photographs of patients in whom folded cymba conchae were used were compared with those in whom quadrangular cartilage was used. Mean lengths and widths of the folded cymba conchae in men and women were 24.2 ± 3.9 and 22.4 ± 3.7mm, and 7.8 ± 1.9 and 7.2 ± 1.9mm, respectively. Using the folded cymba concha graft significantly increased nasal tip projection by 28.9% and columellar-labial angle by 9.7%, improving both aspects postoperatively. Anthropometric comparison revealed no significant differences between folded cymba conchae and septal cartilage in terms of nasal tip projection (p = 0.264) and postoperative columellar-labial angle (p = 0.182). Folded cymba conchal cartilage can be a primary option for CSEG in Asian septorhinoplasty cases or for individuals with insufficient septal cartilage remnants.