Upper Vault Septal Anatomy and Short Nasal Bone Syndrome: Implications for Rhinoplasty.

This is a diagnostic study that investigates the clinical significance between patients with short and long nasal bones and the variation in upper septal composition that would delineate propensity for middle vault collapse. Computed tomographic scans of 16 female patients undergoing evaluation with sinus films were analyzed. Two measurements were taken from each scout image: nasal bone length and total nasal length. Patient scans were separated into 2 groups; patients whose nasal bone length was less than one-half their total nasal length were defined as patients with "short nasal bone" (n = 8), and those with nasal bones longer than one-half the length of their noses were defined as patients with "long nasal bone" (n = 8). Key differences were identified between patients with short and long nasal bones. Total septal area in the upper vault was decreased in the short nasal bone group relative to that of the long nasal bone group (5.7 ± 0.6 cm vs 8.1 ± 1.0 cm, = .002). This was mainly the result of the decreased ethmoid bone component in the short nasal bone group when compared with the long nasal bone group (1.6 ± 0.6 cm vs 3.2 ± 0.8 cm, = .007).