An orthodontic method is disclosed wherein images of the oral cavity are taken in advance by means of computed tomography and the images are analyzed. The orthodontic method includes means for causing bone resorption to the alveolar bone and means for applying an orthodontic force to the tooth without using an orthodontic appliance. The means for applying an orthodontic force to the tooth may be sonic wave vibration applied to the tooth. The means for causing bone resorption to the alveolar bone may be sonic wave vibration applied to the alveolar bone, a laser beam applied to the alveolar bone, or a substance involved in bone resorption being injected into a surface of the alveolar bone. The substance involved in bone resorption may be Th17.
