A Novel Study on Alar Mobility of HAN Female by 3dMD Dynamic Surface Imaging System

• Published in: Aesthetic plastic surgery 2022-02, Vol.46 (1), p.364-372
• Main Authors: Zhong, Yehong, Zhu, Yijia, Jiang, Taoran, Yuan, Jie, Xu, Liang, Cao, Dejun, Yu, Zheyuan, Wei, Min
• Format: Article
• Language: English
• Subjects: Accuracy; Aesthetics; Anthropometry; Body measurements; Esthetics; Female; Females; Humans; Medicine; Medicine & Public Health; Nose; Nose - surgery; Original Article; Otorhinolaryngology; Plastic Surgery; Reference Values; Rhinoplasty; Rhinoplasty - methods; Smiling; Statistical analysis; Treatment Outcome
• ISSN: 0364-216X; 1432-5241
• DOI: 10.1007/s00266-021-02386-1

Aim The aim of this study is to conduct a quantitative analysis on alar mobility of HAN females and provided referenced materials for alar dynamic aesthetic. Methods One hundred and fifty healthy HAN females without rhinoplasty, nasal injury, nasal deformity and craniofacial deformity were included in this study. 3dMD surface imaging system was used for anthropometric analysis. All participants were instructed to perform the desired dynamic facial expression from rest to maximum smile without reveling teeth and recorded by 3dMD dynamic surface imaging system simultaneously. Two frames of rest status and alar maximum enlargement were selected for measuring alar width, alar base width and inner-canthal distance. The difference between two status represented alar mobility, which was generated through equation: MOBILITY = WIDTH smile - WIDTH rest WIDTH rest × 100 % . Results Alar mobility consisted of alar flaring mobility and alar base mobility. The alar flaring mobility was (9.49 ± 4.90)%, reference range was(1.45, 17.53)% and regression equation between rest and maximum smile was Y  = 7.953 + 0.886 X ( R 2  = 0.641, p  = 0.000); the alar base mobility was (17.94 ± 10.44)%, reference range was (0.88, 35.00)% and regression equation between rest and maximum smile was Y  = 4.481 + 0.966 X ( R 2  = 0.528, p  = 0.000. Conclusion Asian alar anatomy has great distinction from Caucasian, processing conspicuous alar movement and damaging alar aesthetic dynamically. This study novelly defined alar mobility by three-dimensional anthropometric analysis, providing objective references for alar dynamic aesthetic and arousing plastic surgeons’ attention on keeping balance of static and dynamic aesthetic in rhinoplasty. Level of Evidence IV This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .