Design: A prospective, single-blnd, randomized trial. Setting: Chang Gung Craniofacial Center and Department of Otolaryngology (ENT). Patients: A total of 80 Taiwanese patients with unilateral cleft lip and palate and dentofacial deformity (age >16 for females, >18 for males; 40 in experimental and 40 in control groups) Interventions: In the experimental group, all patients will receive Le Fort I osteotomy and septoplasty. In the control group, all patients will receive Le Fort I osteotomy only.