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Currently, clefts of the lip, alveolus, and palate are thought to be the most common congenital malformations. In this study, we examined 1,565 cases of clefts we treated over the last 18 years, in order to summarize the clinical features and to evaluate the treatment outcomes. This study involved 589 cleft lip (CL) cases, 576 cleft lip and palate (CLP) cases, 286 cases of cleft palate (CP), 81 cases of submucous CP and 33 cases of CL and submucous CP. The familial incidence was 11.1% (174 cases). Overall, the average incidence of associated congenital abnormalities was 27.9%. Approximately half of the patients with CP alone or with submucous CP were found to have additional congenital malformations. Standeard surgical techniques for unilateral and bilateral CL cases were the Skoog's and Millard's methods, respecively, which resulted in satisfactory outcomes. As a primary operation for CP, pushback procedure was performed using a partial mucosal flap from the palate. Using this procedure 96.5% of 455 cases achieved satisfactory nasopharyngeal closure. The main objective in the treatment of CL patients is not only the repair of growing tissues but also appropriate morphological, functional and psychological reconstruction for the purpose of correcting growth inhibitory problems caused by anatomical malposition. Surgical procedures for CP patients are designed to meet several needs: correction of anatomical abnormalities of the palate and pharynx, achievement of proper nasopharyngeal closure necessary for normal phonation, prevention of growth disturbances of the maxilla, improvements in hearing and auditory tube function, and normalization of occlusion.

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