A complex orthodontic system comprises: multiple sets of dental appliances, and the dental appliances have cavities of respective predetermined geometric shapes to move teeth of a patient from an initial tooth arrangement to an expected tooth arrangement gradually, wherein at least one set of the multiple sets of dental appliances comprises two or more dental appliances of substantially the same geometric shape. The resilience force of the dental appliance can be maintained during the use period by using the complex orthodontic system, which can also shorten the treatment cycle, save materials, and improve the treatment results and the use comfort.
