A method for forming a tooth positioner for repositioning at least one tooth of a patient includes providing a dental arch cast of a patient, separating at least one tooth from the dental arch cast, fixing a pin in a stump part of the at least one separated tooth, and in any non-separated teeth, reconstructing the dental arch cast of the patient by aligning the separated teeth to correspond to the alignment in the patient's mouth and holding the pins in a material that may be softened by heat, heating an area to soften an area, applying force to the pin fixed in the at least one tooth to be repositioned to move it in a desired direction to obtain a realigned arch, and forming a tooth positioner corresponding to the realigned arch. The tooth positioner is used by having the patient wear it for a period of time.