Section of Facial Plastic and Reconstructive Surgery, Division of Otolaryngology/Head and Neck Surgery, Department of Surgery, Pennsylvania State University Medical Center, Hershey, Pennsylvania, USA.
Laryngoscope. 2013 Apr;123(4):875-8. doi: 10.1002/lary.23770. Epub 2013 Jan 3.
OBJECTIVES/HYPOTHESES: Nasal bone length is commonly referenced in the rhinoplasty literature. It has been suggested that short nasal bone length may predispose one to a greater risk of middle vault collapse after rhinoplasty. However, there are limited data available on what constitutes the normal dimensions of these pertinent structures of the nasal sidewall. In addition, no data exist on the gender and ethnic variability of such dimensions. This article reports on measurements of nasal bones and associated structures in adult Caucasian cadavers and their relationships to the nasal sidewall. Furthermore, this study assesses the validity of using surface measurements to approximate the true dimensions of the nasal sidewall structures.
Using 37 adult cadavers, stable, external, nasal landmarks were identified and measured to approximate the dimensions of the nasal bones and upper lateral cartilages. These clinically relevant surface landmarks were then evaluated relative to the direct measurements of dissected nasal bones and upper lateral cartilages in a subgroup of 14 cadavers.
For the subgroup, the average length Ainternal (nasal bone) was 24.57 mm; the average measured length Binternal (upper lateral cartilage) was 12.43 mm. Measurements for the subgroup obtained via external landmarks were 20.21 mm (Aexternal) and 15.67 mm (Bexternal), respectively. The relationship of the nasal bone internal length to the external measurement (A) was a ratio of 1.22:1, whereas the internal length of the upper lateral cartilage to the corresponding external measurement (B) was 0.79:1. Average external measurements for the total group were 20.43 mm for the nasal bone and 14.30 mm for the upper lateral cartilage.
These data provide useful information to guide the surgeon in avoiding middle vault collapse postoperatively and when evaluating those patients with presurgical middle vault concerns. With less ability to support the upper lateral cartilages, short nasal bones can predispose an individual to middle vault collapse postoperatively.
目的/假设：鼻骨长度在鼻整形文献中经常被提及。有人认为，鼻骨长度较短可能使患者在鼻整形后更容易发生中隔穹窿塌陷。然而，关于这些相关的鼻侧结构的正常尺寸，可用的数据有限。此外，关于这些尺寸的性别和种族差异也没有数据。本文报告了成年白种人尸体的鼻骨和相关结构的测量值及其与鼻侧壁的关系。此外，本研究评估了使用表面测量值来近似鼻侧壁结构真实尺寸的有效性。
使用 37 具成人尸体，确定并测量稳定的外部鼻侧标志点，以近似鼻骨和上外侧软骨的尺寸。然后，在 14 具尸体的亚组中，对这些临床相关的表面标志点与解剖的鼻骨和上外侧软骨的直接测量值进行了评估。
对于亚组，平均内（鼻骨）长度 Ainternal 为 24.57mm；平均测量的内（上外侧软骨）长度 Binternal 为 12.43mm。通过外部标志点获得的亚组测量值分别为 20.21mm（Aexternal）和 15.67mm（Bexternal）。鼻骨内长度与外部测量值（A）的关系为 1.22:1，而上外侧软骨内长度与相应的外部测量值（B）的关系为 0.79:1。总组的平均外部测量值分别为鼻骨 20.43mm 和上外侧软骨 14.30mm。
这些数据为外科医生提供了有用的信息，有助于避免术后中隔穹窿塌陷，并在评估术前有中隔穹窿担忧的患者时提供参考。鼻骨较短会使上外侧软骨的支撑能力降低，使个体更容易在术后发生中隔穹窿塌陷。
