Abstract: The present disclosure generally relates to an orthodontic apparatus comprising an appliance body that has a plurality of mechanisms and a supporting cover that is molded based on a patient's teeth positions; and an adjustment base that has a plurality of motors, a plurality of coupling units, a power supply and a processing unit. The adjustment base provides adjustment forces to the plurality of mechanisms through the plurality of motors and the plurality of coupling units when the appliance body is coupled to the adjustment base. The appliance body is then worn by the patient for teeth repositioning where each of the plurality of mechanisms will provide a pushing or pulling force to at least one tooth of the patient.