Apparatus for mandibular advancement of an oral appliance

1. An adjustable oral appliance, comprising:

a first appliance portion comprising a gear assembly having a drive gear, wherein rotation of the drive gear rotates a worm screw that is rotatably coupled to a helical member that extends in an arc from a front position to a rear position of the first appliance portion;

a fixed nut secured proximate the rear position of the first appliance portion;

an actuator screw having a first end threadably engaged in the fixed nut and a second end rotatably coupled to the helical member such that the actuator screw rotates when the helical member rotates;

a first link slidably coupled to the first appliance portion, the first link also being coupled to the actuator screw proximate the second end so that rotation of the actuator screw causes a linear displacement of the first link relative to the first appliance portion as the actuator screw rotates within the fixed nut;

a second appliance portion having a first link-engaging member, wherein the first link exerts a force on the first link-engaging member when it is linearly displaced, and wherein the force causes the second appliance portion to be displaced relative to the first appliance portion;

a second helical member that extends in an arc from a front position to a rear position of the first appliance portion, wherein rotation of the drive gear rotates a second worm screw that is rotatably coupled to the second helical member;

a second fixed nut secured proximate the rear position of the first appliance portion;

a second actuator screw having a first end threadably engaged in the second fixed nut and a second end rotatably coupled to the second helical member;

a second link slidably coupled to the first appliance portion, the second link also being coupled to the second actuator screw proximate the second end so that rotation of the second actuator screw causes a linear displacement of the second link relative to the first appliance portion as the second actuator screw rotates within the second fixed nut; and

a second link-engaging member on the second appliance portion, wherein the linear displacement of the second link exerts a second force on the second link-engaging member when it is linearly displaced, and wherein the second force causes the second appliance portion to be displaced relative to the first appliance portion.

2. The adjustable oral appliance of claim 1 , wherein the drive gear comprises a worm wheel and wherein the first link comprises a flange.

3. The adjustable oral appliance of claim 1 , wherein the first appliance portion comprises a maxillary portion and the second appliance portion comprises a mandibular portion.

4. The adjustable oral appliance of claim 1 , wherein the first appliance portion comprises a mandibular portion and the second appliance portion comprises a maxillary portion.

5. A method of using the adjustable oral appliance of claim 1 , comprising:

rotating the drive gear such that the first link is linearly displaced.

6. The method of claim 5 , wherein the first appliance portion comprises a maxillary portion and the second appliance portion comprises a mandibular portion.

7. A method of using the adjustable oral appliance of claim 1 , comprising:

rotating the drive gear such that the first link and the second link are both linearly displaced.

8. The method of using the oral appliance of claim 7 , wherein the first link and the second link are displaced in substantially equal amounts when the drive gear is rotated.

9. The adjustable oral appliance of claim 1 , wherein the drive gear comprises a worm wheel and wherein the first link comprises a flange and wherein the second link comprises a flange.

10. The adjustable oral appliance of claim 1 , wherein the first appliance portion comprises a maxillary portion and the second appliance portion comprises a mandibular portion.

11. The adjustable oral appliance of claim 1 , wherein the first appliance portion comprises a mandibular portion and the second appliance portion comprises a maxillary portion.

12. The adjustable oral appliance of claim 10 , wherein the drive gear comprises a single worm wheel, and wherein the first link and the second link are linearly displaced in substantially equal amounts in response to rotation of the drive gear.

13. An adjustable oral appliance, comprising:

a first appliance portion;

a first link slidably coupled to the first appliance portion at a first side;

a first means for linearly displacing the first link in response to a single rotational input;

a second appliance portion having a first link-engaging member, wherein the first link exerts a force on the first link-engaging member when it is linearly displaced relative to the first appliance portion, and wherein the force causes the second appliance portion to be displaced relative to the first appliance portion;

a second link slidably coupled to the first appliance portion at a second side;

a second means for linearly displacing the second link in response to the single rotational input; and

a second link-engaging member on the second appliance portion, wherein a linear displacement of the second link exerts a second force on the second link-engaging member when it is linearly displaced, and wherein the second force causes the second appliance portion to be displaced relative to the first appliance portion.

14. The adjustable oral appliance of claim 13 , wherein the first link and the second link are linearly displaced in substantially equal amounts in response to the single rotational input.

15. A method of using the adjustable oral appliance of claim 13 , comprising:

providing the single rotational input such that the first link and the second link are both linearly displaced.

16. The method of using the adjustable oral appliance of claim 15 , wherein the first link and the second link are displaced in substantially equal amounts.

17. A method of using the adjustable oral appliance of claim 13 , comprising:

providing the single rotational input such that the first link is linearly displaced.