The Department of Orthodontics at School & Hospital of Stomatology WMU, is one of the earliest orthodontic departments established in Zhejiang Province. Treatments that can be carried out in the department include dental crowding, maxillary protrusion, mandibular retrusion, bimaxillary protrusion, crossbite, supernumerary tooth and congenital tooth missing. The department also develops collaborative treatments, including sequential treatment of patients with cleft lip and palate, orthodontic-orthognathic surgery combined treatment, orthodontic-periodontic combined treatment, preventive and interceptive treatment in mixed dentition, orthodontic-prosthodontic combined treatment, orthodontic treatment of patients with temporomandibular joint disease and orthodontic treatment of OSAHS. Moreover, a series of international advanced treatment techniques such as straight-wire appliance, self-ligating appliance, functional appliance, lingual appliances and clear aligner have been widely used.