Kim David W, Egan Kristin K
Department of Otolaryngology, University of California San Francisco, San Francisco, California 94115, USA.
Laryngoscope. 2006 Jun;116(6):872-7. doi: 10.1097/01.mlg.0000216796.63683.d3.
We introduce a new metric for measuring nasal tip rotation, the "columellar facial angle." The present study aimed to determine the degree of correlation of the nasolabial angle, the nostril axis, and the columellar-facial angle as metrics of nasal tip rotation in healthy volunteers. The study also aimed to identify any nasal or facial features unrelated to tip position, which consistently altered these values.
Lateral photographs in the Frankfort horizontal plane were taken of 100 volunteers. Measurements of tip rotation were then calculated for each model using three different methods: nasolabial angle, nostril axis, and columellar-facial angle. Data were analyzed for degree of correlation of the three values for all models. Facial features in those subjects with low correlation between measurement methods were analyzed.
For all grouped data, both the nasolabial angle and the nostril axis showed moderate correlations with columellar facial angle but no correlation with each other. Individual subjects whose measurements did not correlate tended to display certain anatomic features: premaxillary deficiency, premaxillary excess, sloped upper lips, or vertical malposition of the nostrils.
No one method of measurement of nasal tip rotation is reliable for all patients. Certain nasal and facial features are likely to alter these values. Of the three measurement methods presented, the columellar-facial angle is most likely to yield consistent measurements of nasal tip rotation.
我们引入一种用于测量鼻尖旋转度的新指标——“鼻小柱面部角”。本研究旨在确定在健康志愿者中，鼻唇角、鼻孔轴和鼻小柱面部角作为鼻尖旋转度指标的相关程度。该研究还旨在识别与鼻尖位置无关但会持续改变这些值的任何鼻部或面部特征。
对100名志愿者拍摄法兰克福水平面的侧面照片。然后使用三种不同方法为每个模型计算鼻尖旋转度测量值：鼻唇角、鼻孔轴和鼻小柱面部角。分析所有模型这三个值的相关程度数据。对测量方法之间相关性较低的受试者的面部特征进行分析。
对于所有分组数据，鼻唇角和鼻孔轴与鼻小柱面部角均显示出中等相关性，但彼此之间无相关性。测量值不相关的个体受试者往往表现出某些解剖特征：上颌前突不足、上颌前突过度、上唇倾斜或鼻孔垂直错位。
没有一种测量鼻尖旋转度的方法对所有患者都是可靠的。某些鼻部和面部特征可能会改变这些值。在所提出的三种测量方法中，鼻小柱面部角最有可能得出一致的鼻尖旋转度测量值。
