Oral device for mandibular advancement and medial tongue constraint
An oral device for temporary placement in a patient's oral cavity includes upper and lower jaw braces and a tongue-engaging member. The upper and lower jaw braces are connected so that the lower jaw brace is advanced in an anterior direction relative to the upper jaw brace when the upper and lower jaw braces are closed together. A partial vacuum is drawn in the oral cavity and the vacuum and lower jaw displacement together control the position of the tongue in order to clear the patient's airway to reduce sleep apnea or treat other conditions.
1. An oral device for temporary placement in a patient's oral cavity, said device comprising:
an upper jaw brace comprising a bite plate;
a lower jaw brace comprising a bite plate;
a vacuum source which is connectable to the oral device; and
a tongue-engaging member configured to be disposed to engage a medial region of the tongue, which is connectable to the vacuum source which maintains a desired level of vacuum within the patient's oral cavity,
wherein the upper jaw brace is configured to capture the upper jaw and the lower jaw brace is configured to capture the lower jaw, and the upper and lower jaw braces are adjustably coupled to one another such that so that the lower jaw brace is advanced in an anterior direction relative to the upper jaw brace,
wherein the upper jaw brace and the lower jaw brace are connected by a pair of links which are configured with adjustable lengths to allow movements of the jaws.
2. The oral device of claim 1 , wherein the tongue-engaging member has an anterior surface and a posterior surface where the anterior surface is configured to be inclined forwardly at an angle in the range from 45° to 60° relative to a plane of the patient's jaw.
3. The oral device of claim 2 , wherein the anterior surface of the tongue-engaging member is generally parallel to the posterior surface.
4. The oral device as in claim 1 , wherein the upper and lower jaw braces comprise bite plates configured to be U-shaped and positioned against a full dentition.
5. The oral device of claim 1 , wherein the upper and lower jaw braces comprise tooth retainer structures.
6. The oral device of claim 1 , wherein the upper and lower jaw braces are formed from ethylene vinyl alcohols (EVA's).
7. The oral device of claim 1 , wherein the pair of links are capable of elongating to provide the necessary freedom for the jaws to open and close.
8. The oral device of claim 1 , wherein the pair of links comprise elastic bands and anchors.
9. The oral device of claim 1 , wherein the lower jaw brace is configured to be advanced relative to the upper jaw brace by a distance in a range from 4 mm to 12 mm when the upper and lower jaw braces are closed together.
10. The oral device of claim 1 , wherein the vacuum source is adapted to draw a vacuum in a range from 1 cm H2O to 100 cm H2O through the oral device.
11. The oral device of claim 1 , wherein the tongue-engaging member has one or more vacuum ports.
12. A method for maintaining an open airway in a patient having an oral cavity, a tongue, and a palate, said method comprising:
engaging an upper jaw brace comprising a bite plate against upper teeth of a patient;
engaging a lower jaw brace comprising a bite plate against lower teeth of a patient; and
applying a vacuum within the oral cavity to draw together the soft palate and a posterior region of the tongue; and
engaging the upper and lower jaw braces with one another so that the lower jaw brace moves in an anterior direction relative to the upper jaw brace when the jaws are closed together-; and
adjusting a pair of links which are configured with adjustable lengths to allow movements of the jaws.
13. The method of claim 12 , further comprising providing a tongue engaging member against a medial region of the patient's tongue to provide a clearance between the medial region of the patient's tongue and palate.
14. The method of claim 13 , wherein the vacuum draws together the soft palate and the posterior region of the tongue through one or more vacuum ports provided on a tongue-engaging member.
15. The method of claim 13 , wherein the vacuum in the oral cavity draws the soft palate against a posterior surface of the tongue-engaging member.
16. The method of claim 12 , wherein the lower jaw brace is adjusted to be advanced relative to the upper jaw brace by a distance in a range from 4 mm to 12 mm when the upper and lower jaw braces are closed together.
17. The method of claim 16 , further comprising providing a tongue engaging member against a medial region of the patient's tongue to provide a clearance between the medial region of the patient's tongue and palate.
18. The method of claim 12 , wherein the bite plate is heated for softening and then molded to a patient's dentition.
19. The method of claim 12 , wherein the bite plate is vacuum molded from plaster or cast of the teeth.