Cleft lip Cleft lip is a very common congenital malformation with an incidence of about 1:1000, manifesting as a unilateral or bilateral partial or complete splitting of the upper lip. The causes of cleft lip are imprecise and multifactorial, and may be related to genetics, endocrine, nutrition, infection, hypoxia, drugs, radiation, tobacco and alcohol. Cleft lip can be divided into unilateral cleft lip and bilateral cleft lip by site, and I, II and III degrees by degree. It is generally believed that unilateral cleft lip surgery is better performed in the first 3-6 months of life, but bilateral cleft lip surgery is more securely performed after 6 months of age, but the surgery should be completed within 1 year of age. 3-6 months of age, if the cleft lip is properly repaired, the alveolar cleft can heal automatically as if the surgery was performed at birth, and the malformation of the front teeth can also be corrected to some extent. If the surgery is not performed within 1 year of age, the results of the repair after 1 year of age are not as good as those of the early repair. This is because after 1 year of age the labial muscles are about to atrophy and the alveolar process and incisors will protrude beyond the cleft. As a result, the surgery will not be able to completely correct the deformity. Surgery for cleft lip in infants and children is usually performed under general anesthesia with intubation. There are very many methods of cleft lip repair, nowadays, the commonly used methods are Tennison method, Millard method, Changgeng method, trilobal flap method, etc. However, there is no gold standard, and it is often determined by the surgeon according to his own experience and habits, we use the millard method with excellent results. Cleft lip nasal deformity The nose is located in the center of the five senses and its shape has an important role in facial aesthetics. Cleft lip is a common congenital deformity, and although early repair is currently advocated in infancy, most patients are left with varying degrees of nasal deformity as the child develops, which significantly affects facial aesthetics in severe cases. Therefore, the study of nasal deformity secondary to cleft lip has been receiving attention. The exact cause of nasal deformity secondary to cleft lip is still unknown, but current studies suggest that it is mainly related to endogenous embryonic developmental abnormalities (embryological mechanism) and exogenous disorders of perioral muscle balance, etc. (anatomical mechanism). In 1993, Sykes et al. described the deficiencies and deformities of unilateral and bilateral cleft nasal deformities from anterior-posterior, lateral, basal and oblique views, and concluded that unilateral cleft nasal deformities are mainly characterized by nasal wing collapse, abduction and ptosis, short and deviated nasal minors, nasal base depression, and in severe cases, nasal septum curvature. Complete bilateral cleft lip nasal deformity is the most serious, because the maxillary bone is separated and the nasal base tissue is absent, which often leads to nasal column development disorder, nasal tip is low and the nasal wing is horizontally abducted. The timing of treatment for cleft lip and nasal deformity is generally considered to be in three stages. I. Unilateral cleft lip repair in infancy can be performed at the same time to correct the nasal deformity. Secondly, during the age of 9-11 years, the second stage of cleft lip and nose deformity can be corrected at the same time as orthodontic treatment, alveolar cleft bone grafting and submandibular nasal bone grafting. Third, between 14 and 16 years of age, because the patient’s development has basically matured and the nasal cartilage is dense and elastic, it is a favorable period for the second-stage surgery to rectify cleft lip of nasal deformity, and a more thorough correction of nasal deformity should be performed. The main treatment method for nasal deformity secondary to cleft lip is surgery, with the aim of surgically restoring the external shape of the nose, opening the nasal tract, and improving the aesthetics and function of the nasal shape. There are many methods to repair cleft lip nasal deformity, but the general principle is to treat the patient according to the specific manifestation of nasal deformity and to adopt the corresponding surgical method in a targeted manner in order to achieve the best treatment effect. We have gradually formed a set of characteristic series of restorative measures in a large number of clinical practice operations, paying special attention to the free repositioning of nasal septum cartilage and nasal wing cartilage and the supplemental shaping of nasal cartilage scaffold, the reconstruction of nasal wing cartilage muscle ring, the release and shaping of overlying skin, and the filling of pear-shaped foramen margin (in the presence of maxillary dysplasia). By strictly implementing this series of restorative measures, the nasal deformity can be well repaired.