Abstract: The invention relates to a method for calculating a stimulus for the change of shape of a medical aid in order to change the position of the medical aid from an actual position to a final target state. In order to achieve optimized treatment for the patient, a method comprising the following steps is provided: Detecting the actual position of the body part to be corrected after a first correction step in a control unit, Comparing the actual position of the body part to be corrected with a target position that is stored in the control unit, If applicable, detecting, by the control unit, the deviation between the actual position and target position of the body part to be corrected, Calculating with the control unit the stimulus that has to act on the medical aid to perform a second correction step, taking into account the deviation between the actual state and target state of the body part to be corrected, wherein the effect of the stimulus on the medical aid is saved in the control unit.

Abstract: The present disclosure relates to a method for carrying out an orthodontic intervention, using a set of orthodontic correction devices, with the aim of transferring via the correction devices at least part of the teeth from an actual position into a corrected target position, and employing several steps (S1, S2, S3, S3?, S4, S5), each correction device being associated with at least one step. In two subsequent steps (S3, S3?) two correction devices (1; 2), which have a substantially identical shape, are used.

Abstract: The invention relates to a method for the repeated activation of orthodontic correction devices with a known critical temperature (Tkrit) and a glass transition temperature (Tg) lying above the critical temperature. In the method according to the invention, in order to guarantee gentle repeated activation, an orthodontic correction device is heated to a temperature that lies above the critical temperature but below the known glass transition temperature. The invention also relates to a device for performing the method.