Atighechi Saeid, Dadgarnia Mohammadhossein, Vaziribozorg Sedighe, Jokar Zahra, Sadeghmanesh Ruhollah
Department of Otolaryngology-Head and Neck Surgery, Otorhinolaryngology Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
The School of Iranian Traditional Medicine, Shahid Sadoughi University of Medical Sciences, Ardakan, Yazd, Iran.
Eur Arch Otorhinolaryngol. 2018 May;275(5):1235-1237. doi: 10.1007/s00405-018-4926-3. Epub 2018 Mar 7.
The nasal tip refinement is the most difficult stages of rhinoplasty surgery; whereas, the most important part in terms of beauty and performance is the projection refinement. Lateral crural overlay (LCO) is a common technique in rhinoplasty used to reduce nasal tip projection and increase nasal tip rotation. Given the important role of lower lateral cartilage (LLC) in the non-collapse of nasal external valve and air passage, it is necessary to evaluate the changes in nasal elasticity caused by surgery.
The design of this quasi experimental study was self-control (before-after). Tip plasty was performed on twenty-four samples (12 cases of rhinoplasty) using LCO technique. To examine the elasticity, the strain index of each ala was measured by a mechanical device, invented by the author, before and after the operation.
Out of 24 samples 12 were female and 12 were male. The mean strain index of nasal ala before and after the surgery was 0.24 ± 0.046 and 0.19 ± 0.040 respectively (P < 0.001). The mean strain index of nasal ala before and after surgery for female was 0.27 ± 0.046 and 0.20 ± 0.050 respectively (P = 0.004). For male, it was 0.20 ± 0.018 before and 0.18 ± 0.020 after the surgery. (P < 0.001).
Using LCO surgical technique for nasal tip refinement can lead to nasal elasticity increase regardless of gender; although, LLC is cut during implementing this technique.
鼻尖整形是鼻整形手术中最困难的阶段；然而，就美观和功能而言，最重要的部分是鼻尖突出度的改善。外侧脚覆盖（LCO）是鼻整形术中一种常用的技术，用于降低鼻尖突出度并增加鼻尖旋转度。鉴于下外侧软骨（LLC）在鼻外瓣膜和气道不塌陷方面的重要作用，有必要评估手术引起的鼻部弹性变化。
本半实验性研究采用自身对照设计（术前术后）。对24个样本（12例鼻整形手术）采用LCO技术进行鼻尖整形。为了检测弹性，作者发明的一种机械设备在手术前后测量了每个鼻翼的应变指数。
24个样本中，12例为女性，12例为男性。手术前后鼻翼的平均应变指数分别为0.24±0.046和0.19±0.040（P<0.001）。女性手术前后鼻翼的平均应变指数分别为0.27±0.046和0.20±0.050（P=0.004）。男性手术前为0.20±0.018，手术后为0.18±0.020（P<0.001）。
使用LCO手术技术进行鼻尖整形，无论性别如何，均可导致鼻部弹性增加；尽管在实施该技术过程中会切断LLC。
