Abstract: An orthodontic device for use in applying a constant calibrated force to certain teeth or groups of teeth so as to cause the teeth to change position within the mouth over a period of time. The device includes a spring module having a telescope mechanism with inner plunger portion and outer tube portion, and with a calibrated compression coil spring concentrically positioned on the inner plunger portion within the tube portion. The telescope plunger is of a bent arm configuration to assist in providing clearance relative to other installed orthodontic means. A notch is provided in the forward inner wall of the telescope tube to assist in controlling operation of the spring. A bifurcated yoke on the plunger end and a ball and socket type anchor pin on the tube end are employed to secure the device to brace wires mounted on the teeth of a patient.

Abstract: An orthodontic bite jumping device for attachment to orthodontic brace wires affixed to the teeth of the upper and lower jaw of a patient for treatment of overbite. The device includes, for each side of the jaw, a telescope mechanism which is mounted at either end on a respective trunnion member affixed to a brace wire located on the upper and lower teeth. Each trunnion member has a radial slot adjacent the inner end for receiving one of the brace wires. The connection between at least one of the ends of the telescope mechanism and the respective trunnion is such as to provide looseness or "play" in the interaction thereof, making the device more flexible and resilient and thus more durable within the mouth, while at the same time maximizing the comfort of the patient.