A bite-correcting orthodontic appliance attaches directly to the elements of braces (i.e., brackets and archwires); flexes in its distal 25-45% to stay away from the food bolus; has a smooth rectangular profile for patient comfort; and introduces gentle force vectors to the patient's upper and lower teeth that sweep in an arch to lift up on the front of the molar and down on the lower front teeth as the appliance tries to return to its preinstalled (passive) state, resulting in rapid, yet gentle changes unseen in the orthodontic industry. A lock-and-key attachment member is disclosed allowing for ease of installment in the patient's mouth.