Abstract: An improved dental apparatus that can treat Class II or Class III malocclusions without the need for braces, that can be repaired outside of the patient's mouth, that can be temporarily removed by the patient, that can be fitted, calibrated, set up and adjusted outside the patient's mouth prior to installation, and that is inexpensive. It utilizes universal torsion springs with accurate bending forces assembled with linear members of varying lengths to make a curved intrusive vector force device connecting teeth aligners that apply gentle constant forces to correct underbite and overbite conditions.

Abstract: An improved dental apparatus that can treat Class II or Class III malocclusions without the need for braces, that can be repaired outside of the patient's mouth, that can be temporarily removed by the patient, that can be fitted, calibrated, set up and adjusted outside the patient's mouth prior to installation, and that is inexpensive. It utilizes universal torsion springs with accurate bending forces assembled with linear members of varying lengths to make a curved intrusive vector force device connecting teeth aligners that apply gentle constant forces to correct underbite and overbite conditions.