When analyzing the treatment results obtained in growing patients it is obvious that the majority of the changes occur as a result of vertical and sagittal growth. The dental movements resulting from the orthodontic appliance has only facilitated the utilization of the growth in obtaining the result. In adult patients, on the other hand the treatment result depends on the tooth movements generated by the orthodontic appliance. Although function and occlusal forces have an influence in theory there is only one line of action of the force that is correct for each tooth movements defined in 3D. This indicates that the necessary tooth displacement should be defined before an efficient appliance can be inserted. The lecture will demonstrate how, when the treatment goal is known, an efficient appliance can be selected.
Define the tooth movements necessary to obtain the desired treatment goal.
Produce an appliance delivering a specific force system directly or by the combination of two vectors.
Adapt the mechanics to the periodontal status of the teeth to be moved.