Long-Term Three-Dimensional Morphometric Outcome Study of Nasal Bone in Cleft Patients.

Cleft lip nose deformities are characterized by underlying features in the bony skeleton as well as the soft tissues; however, no previous study has focused on the evaluation of the nasal bone. The aim of this study was to compare nasal bone features among adult patients with unilateral cleft lip with or without cleft palate, those with bilateral cleft lip and palate, and controls. Included in this retrospective study were patients aged ≥16 years with nonsyndromic cleft who underwent long-term orthodontic treatment and controls aged 18-45 years who underwent surgery for jaw deformities at Keio University Hospital. Piriform width, nasal width, and nasomaxillary angle values measured on CT were compared among the groups using the Wilcoxon rank sum test. Nine patients had unilateral cleft lip and alveolar cleft, 19 had unilateral cleft lip and cleft palate, and 14 had bilateral cleft lip and palate (BCLCP). There were 18 controls. Mean piriform width and mean nasomaxillary angle were significantly greater in the BCLCP group than the control group (20.1±2.54 mm versus 18.8±1.35 mm, P<0.05; and 105.8±8.13 degrees versus 100.4±7.95 degrees, P<0.05, respectively). There was no significant difference in mean nasal width among the groups. Nasal bone morphology was not affected by initial cleft lip alone or by the presence or absence of cleft palate. Patients with bilateral cleft lip and palate have a wider and lower nose than those without cleft deformity and might benefit more from reduction of the bony nasal width than from treatment of the soft tissues.