# Patent

## Title
Mouth guards, kits, and methods

## Abstract

Mouth guards include either an upper member fitting the interior and exterior surfaces of a user's upper dentition, or a lower member fitting similarly adjacent a user's lower dentition, or both. The lower member includes molar extensions projecting away from the lower member. The upper member includes upper molar extensions projecting away from the upper member and toward the lower molar extensions so that when the user bites or clenches, the upper right and lower right extensions impinge on one another, as do the molar upper left and lower left extensions. The upper and lower members have an anterior shape to form a gap ranging from about 5 to about 15 mm and sufficient for the user's tongue to extend into the gap. Methods of using the apparatus and kits as mouth guards.

## Background
BACKGROUND INFORMATION
Technical Field
The present disclosure relates to mouth guards, kits, and methods.
SUMMARY
In accordance with the present disclosure, oral devices and kits are presented, as well as methods of using same, which may be used as mouth guards.
A first aspect of the disclosure is a mouth guard comprising at least one or both of an upper generally arched-shaped member and a lower generally arched-shaped member, wherein:
a) the upper generally arched-shaped member is configured to fit adjacent at least a portion of interior and exterior surfaces of a user's upper dentition, the upper generally arched-shaped member consisting of a moldable polymeric material;
b) the lower generally arched-shaped member consists of the same moldable polymeric material that is configured to fit adjacent at least a portion of interior and exterior surfaces of the user's lower dentition;
c) the lower generally arch-shaped member comprises a posterior lower right molar extension and a posterior lower left molar extension each consisting of the same moldable polymeric material, the posterior lower right and the posterior lower left molar extensions formed integrally with and projecting generally perpendicularly away from the lower generally arch-shaped member and generally toward the upper generally arch-shaped member;
d) the upper generally arch-shaped member comprises a posterior upper right molar extension and a posterior upper left molar extension consisting of the same moldable polymeric material, the posterior upper right and posterior upper left molar extensions formed integrally with and projecting generally perpendicularly away from the upper generally arch-shaped member and generally toward the lower generally arch-shaped member;
e) so that when the user bites or clenches, the posterior upper right molar extension impinges on the posterior lower right molar extension, and the posterior upper left molar extension impinges on the posterior lower left molar extension;
f) the upper and lower generally arch-shaped members having an anterior shape to form a gap ranging from about 5 to about 15 mm and sufficient for at least a portion of the user's tongue to extend forward into the gap without being impeded in forward movement by the apparatus;
g) the posterior lower right molar extension, posterior lower left molar extension, posterior upper right molar extension, and posterior upper left molar extension each configured such that, when the apparatus is in the user's mouth, the molar extensions create a tendency to keep the user's airway open by maintaining the gap.
Any of the apparatus described herein may be part of a kit comprising one or both upper and lower generally arch-shaped members substantially as described herein, in certain embodiments packaged in a carrying case.
A second aspect of the disclosure is a method comprising:
a) inserting one of or both the upper and lower generally arch-shaped members into a users mouth and onto the upper and lower dentitions; and
b) a user wearing one or both of the upper and lower generally arch-shaped members as a mouth guard.
Certain methods may comprise adjusting one or both arch-shaped members to comfortably fit the user's upper and/or lower dentitions.
Further aspects and advantages of apparatus and methods of the present disclosure will become apparent by reviewing the detailed description that follows.



BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1, 2, and 3 are various views of one apparatus or kit embodiment within the present disclosure;
FIGS. 2A and 2B are views of another apparatus or kit embodiment within the present disclosure;
FIGS. 3A and 3B are views of another apparatus or kit embodiment within the present disclosure;
FIG. 4 is a schematic side elevation view of an arrangement of magnets useful in the apparatus or kit illustrated schematically in FIGS. 1-3;
FIGS. 5, 6, and 7 illustrate schematically various views of another apparatus or kit embodiment in accordance with the present disclosure; and
FIGS. 8, 9, and 10 illustrate schematically various views of another apparatus or kit embodiment in accordance with the present disclosure.



It is to be noted, however, that the appended drawings are not to scale and illustrate only typical embodiments of this disclosure, and are therefore not to be considered limiting of its scope, for the apparatus, kits, and methods of the disclosure may admit to other equally effective embodiments. Identical reference numerals are used throughout the several views for like or similar elements.
DETAILED DESCRIPTION
In the following description, numerous details are set forth to provide an understanding of the disclosed oral devices, kits and methods of their use. However, it will be understood by those skilled in the art that the oral devices, kits, and methods covered by the claims may be practiced without these details and that numerous variations or modifications from the specifically described embodiments may be possible and are deemed within the claims. All U.S. published patent applications and U.S. Patents referenced herein are hereby explicitly incorporated herein by reference. In the event definitions of terms in the referenced patents and applications conflict with how those terms are defined in the present application, the definitions for those terms that are provided in the present application shall be deemed controlling.
As used herein the phrase “generally arched-shaped” means the shape of a member resembles an arch in the same way that the upper and lower teeth of a user resemble arches. The phrase “adjacent at least a portion of interior and exterior surfaces”, as that term is used herein when referring to the generally arch-shaped members, means that the generally arch-shaped members are adjacent to and touching at least one surface of the upper or lower teeth concerned, but some “looseness” is allowed, so that the members may move away from the teeth slightly, for example if the material of the member stretches or deforms, such as during insertion into or removal from the mouth. As used herein the term “user” means a human or other mammal that employs an apparatus of this disclosure in its mouth. The term “subject” may also be used and is considered interchangeable with the term “user.”
The present disclosure relates generally to apparatus, kits, and methods for use as athletic mouth guards for upper, lower, or both dentitions.
In certain embodiments, the gap (denoted G1 in the various figures) may have a distance ranging from about 1 to about 20 mm, or from about 5 to about 15 mm.
The lateral length (L1 in FIG. 7) of the upper and lower molar extensions, i.e., the distance along the molar teeth, may be 10 mm or more, or may range from 10 to about 50 mm or from about 12 to about 24 mm. In certain embodiments having an offset, the length of the upper and the lower molar extensions may each be about one half of these lengths. In certain embodiments, a goal is to keep the upper and lower molar extensions as short as possible to maintain the gap as large as possible.
In certain embodiments the molar extensions may have a vertical length (L2 in FIG. 7) of 20 mm or less, in certain embodiments 16 mm or less. The average vertical distance of upper and lower molar extensions in non-offset embodiments is about 10 mm (5 mm for upper, 5 mm for lower molar extensions). In certain embodiments that may have an “offset”, such as may be provided by left and right-side ramps as illustrated in FIGS. 8, 9, and 10, the upper or lower molar extensions may comprise the entire vertical length (i.e., all 10 mm may in certain embodiments be in the upper molar extensions; in certain other embodiments the entire 10 mm may be in the lower molar extensions). In certain embodiments within the first aspect the upper generally arch-shaped member comprises two upper molar extensions, one extending from a right-side upper molar region, and the second extending from a left-side upper molar region. Similarly, in certain embodiments within the second aspect the upper generally arch-shaped member comprises two lower molar extensions, one extending from a right-side lower molar region, and the second extending from a left-side lower molar region.
In certain embodiments the upper and lower members each may comprise a moldable material selected from the group consisting of synthetic and natural materials. Synthetic materials may be selected from the group consisting of polymeric materials, as further discussed herein. In certain apparatus the arch-shaped members and the molar extensions comprise a polymeric material.
In certain embodiments, each molar extension may comprise at least one magnet. In certain embodiments the magnets are embedded in the polymeric material of the molar extensions. In certain embodiments, an upper right magnet has polarity opposite that of a lower right magnet, and an upper left magnet has a polarity opposite that of a lower left magnet. In certain embodiments, the magnets may be flat shaped and embedded into the plastic of the molar extensions. In certain embodiments, such as illustrated in FIG. 4, the flat-shaped magnets may have a north pole on one of their major surfaces and a south pole on its other major surface.
Referring to FIGS. 1 and 2, there is illustrated schematically a perspective view of one apparatus 100 in accordance with the disclosure. Apparatus embodiment 100 includes an upper generally arch-shaped member 2 and a lower generally arch-shaped member 4. Upper generally arch-shaped member 2 includes an exterior wall 8 and an interior wall 10, custom-shaped for the user's upper dentition, and which together define a trough 6 for friction fitting adjacent the upper dentition of a user. An upper connecting portion 12 connects exterior wall 8 and interior wall 10. Connecting portion 12 may be rather thin or pointed in the area of the front teeth, and rather flat or planer in the area of the back molar teeth. Similarly, lower generally arch-shaped member 4 includes an exterior wall 14, and an interior wall 16, the latter being mostly hidden in the views of FIGS. 1 and 2. A lower connecting portion 18 connects walls 14 and 16, and as with upper connecting portion 12, lower connecting portion 18 may be rather thin or pointed near the front teeth of the user, and rather flat or planar near the lower molars of the user.
As perhaps more clearly viewed in FIG. 2, embodiment 100 includes a lower left molar extension 20 and an upper left molar extension 22, each extending generally perpendicularly away from their respective members. FIG. 3 illustrates schematically upper generally arch-shaped member 2 in a 180 degree flip from its “in use” position to more clearly illustrate a lower right molar extension 24 and an upper right molar extension 26. FIG. 3 also allows viewing of flat-shaped magnets 28, 30, 32 and 34 fully embedded in their respective molar extensions. Members 2 and 4, as well as molar extensions 20, 22, 24, and 26 comprise the same moldable polymeric material in this embodiment.
As generally may be seen in FIGS. 2 and 3, and more specifically illustrated in the schematic diagrams in FIG. 4, magnets 28 and 30 have, in this embodiment, a specific spatial relationship. The respective north and south poles of these magnets are arranged so that when placed as viewed in FIG. 4, they will substantially repel one another by virtue of their respective magnetic field lines being unable to cross, forcing the mandible down and forward. Magnets 32, 34 may have the same spatial and magnetic relationship. As this occurs, embodiment 100 will tend to keep a user's airway open by creating a gap between upper portion 2 and lower portion 4, near the front teeth, as indicated by double-headed arrow G1 in FIGS. 1 and 2.
FIGS. 2A and 2B are views of another apparatus or kit embodiment 200 within the present disclosure. In embodiment 200, magnets 28A, 28B, 30A, 32A, 32B, and 34A are all embedded in their respective molar extensions. In embodiment 200, magnet 28A has a south pole facing away from left lower molar extension 20, and a north pole facing left lower molar extension 20. Magnet 28B has a south pole facing left lower molar extension 20, and a north pole facing away from left lower molar extension 20. Also in embodiment 200, magnet 32A has a south pole facing away from right lower molar extension 24, and a north pole facing right lower molar extension 24. Magnet 32B has a south pole facing right lower molar extension 24, and a north pole facing away from right upper molar extension 24. Magnet 34A has a south pole facing away from right upper molar extension 26, and a north pole facing toward right upper molar extension 26. Magnet 30A has a south pole facing away from left upper molar extension 22, and a north pole facing toward left upper molar extension 22. It is noted that the magnetic poles of each magnet could be reversed to arrive at substantially the same embodiment. In both embodiment 200 and its “reverse” poles sister embodiment, there will be magnetic attraction between magnets 28B and 30A, as well as between magnets 32B and 34A, while there will be a slight magnetic repulsion between magnets 32A and 34A, as well as between magnets 28A and 30A. In this embodiment and others like it, the magnetic attraction and repulsion thus may be adjusted depending on the particular user, for example the strength of the user's jaw muscles.
FIGS. 3A and 3B are views of another apparatus or kit embodiment 300 within the present disclosure. In embodiment 300, magnets 28C, 30C, 32C, and 34B are all embedded in their respective molar extensions. In embodiment 300, magnet 28C has a south pole facing toward left lower molar extension 20, and a north pole facing away from left lower molar extension 20. Magnet 32C has a south pole facing right lower molar extension 24, and a north pole facing away from right lower molar extension 24. Also in embodiment 300, magnet 30C has a south pole facing away from left upper molar extension 22, and a north pole facing left upper molar extension 22. Magnet 34B has a south pole facing away from right upper molar extension 26, and a north pole facing right upper molar extension 26. Magnet 34C has a south pole facing away from right upper molar extension 26, and a north pole facing right upper molar extension 26. It is noted that the magnetic poles of each magnet could be reversed to arrive at substantially the same embodiment. In both embodiment 300 and its “reverse” poles sister embodiment, there will be magnetic attraction between magnets 28C and 30C, as well as between magnets 32C and 34B. In this embodiment and others like it, the magnetic attractions may be adjusted depending on the particular user, for example the strength of the user's jaw muscles, by adjusting the strength of the magnets.
FIGS. 5, 6, and 7 illustrate schematically various views of another apparatus embodiment 400 in accordance with the present disclosure, which is the same as embodiment 100 but without magnets. FIG. 7 illustrates lengths L1 and L2, as well as gap G1.
FIGS. 8, 9, and 10 illustrate schematically various views of another apparatus or kit embodiment 500 in accordance with the present disclosure, illustrating an offset or ramp R between upper portion 2 and lower portion 4 created by a left ramp area (RL) and a right ramp area (RR). A tapered lower anterior left molar extension 20A may slidingly move adjacent a matching tapered upper posterior left molar extension 22 in the area of left ramp area RL, where faces of components 20A and 22 may slide against each other at an angle α (FIG. 10). Similarly on the right side, a tapered lower anterior right molar extension 24A may slidingly move adjacent a matching tapered upper posterior right molar extension 26 (not viewable in FIGS. 8 and 10, but illustrated in exploded view of FIG. 9). Ramps RL and RR create a tendency for the lower portion 4 to move downward as lower portion 4 moves back toward the user's throat. Movement of the lower jaw backwards is a natural movement during sleep. As this occurs, embodiment 500 will tend to keep the airway open by creating a gap between upper portion 2 and lower portion 4, near the front teeth, as indicated by double-headed arrow G1 in FIG. 1. This gap may be important in methods of reducing nasal drainage, perhaps more important than forward movement of the lower jaw.
The materials of construction of the upper and lower members may comprise any moldable plastic (polymeric) material that is approved for use in oral medical devices and appliances for human use and that may be custom fitted for each user and tooth-retained via friction grip, and materials approved for animal use. The members may comprise a single material, or combination of materials. The members may comprise more than one layer of material, and each layer may be the same or different. The polymeric materials may be filled with various fillers, extenders, pigments, and other additives. Suitable polymeric materials include thermoplastics, thermosetting polymers, elastomers, and thermoplastic elastomers. The polymeric materials may comprise co-polymers, ter-polymers, and blends of two or more chemical types of polymers, or blends of two or more polymers of the same chemical type, for example, a blend of two thermoplastics having different molecular weights.
Examples of specific polymers include polyacrylics, polyvinyls, polyvinyl alcohols, and the like. An example of a suitable polymeric material is a durable fade-proof acrylic that retains its shape and color for at least four-five years. Another example is made of a very pliable, soft, custom-injected silicone. Another example is a polymeric material compatible with home/office based bleaching techniques, such as the material used to make an OSAP device, and materials that can be molded into a ready-made semi-universal trial version, which may be suitable for patients who cannot endure having their impressions taken. In addition, the trial version is an inexpensive way to test a particular patients' tolerance to oral therapy. Another example is the material used in the device known under the trade designation SAGA. This device consists of a hard acrylic shell laminated to a soft vinyl liner. Another example is the acrylic material (BruxezeTM) that softens in hot water to provide a combination of comfort, strength, and retention, and which is used in the Adjustable PM PositionerTM, an appliance that fits over all maxillary and mandibular teeth. Another example are the materials used in the device known as SomnoGuard® AP, which consists of an upper and a lower tray each made of two materials. The outer tray shells consist of solid clear and transparent medical grade polycarbonate. The inner lining which accommodates the teeth impressions is made of a thermoplastic copolymer. After the oral appliance is heated in a hot water bath its thermoplastic body molds easily to the teeth and jaws allowing any medical doctor to fit the device chair side. Yet another example is the material employed in the device known as SomnoGuard AP Pro®, which is a dental lab made two-part mandibular adjustable positioner to treat snoring and mild to moderate sleep apnea, and comprises common acrylic/elastomeric thermoform dental materials available in any dental lab after taking impressions of the lower and upper jaws and producing plaster models. Other polymeric materials that may be useful include nitinol, silicone, a PET, or any other biocompatible polymeric material. Other possible examples include PTFE, e-PTFE, polypropylene, polyurethane, polycarbonate, polyethylene terephthalate, stainless steel, titanium, tantalum, gold, polyvinidylene fluoride and combinations thereof.
The molar extensions may either be molded using special molds, or built up by applying a paste or solution of polymeric precursor materials and swabbing the precursors materials on the appropriate areas. In certain embodiments, this may need to be done repeatedly to build up the molar extension to functional length.
Magnets which may be useful in apparatus of this disclosure include rare earth magnets, such as samarium-cobalt and neodymium-iron-boron magnets. It has become possible to produce magnets with small enough dimensions for dental applications and yet still provide the necessary forces. Certain embodiments may employ magnets of the “closed field” type. In this type of system, a soft magnetic or ferromagnetic material, such as ferritic or martensitic stainless steel or Pd—Co—Ni alloy, is implanted into the jaw, rather than a magnet, to provide attractive force to hold the denture in place. This implant is known as a “keeper”. In this configuration, the magnetic field lines are shunted through the keeper as it is the path of minimum energy and there is no magnetic field experienced in the oral cavity. U.S. Pat. Nos. 6,659,771, 5,678,998, 5,013,243 and 6,299,450 describe small yet powerful magnets for cooperating with a non-magnet implanted “keeper” for denture attachment. The non-magnet keeper is made of a magnet-attracted material, such as a soft magnetic or ferromagnetic material, but is not a permanent magnet. U.S. Pat. No. 4,396,373 describes a removable orthodontic appliance having two permanent magnets carried by two caps, respectively, having facing poles which are in registry when the mouth is normally closed, exerting a magnetic force in a direction substantially normal to the occlusal plane. The opposing magnets have confronting poles with like-polarity such that the magnets repel and develop intrusive forces upon the respective teeth. U.S. Pat. No. 4,671,767 discloses both fixed and removable orthodontic devices that use magnets. The magnets are secured to removable or fixed orthodontic devices and are positioned bilaterally in the posterior molar regions. The faces of the magnets are oriented such that they repel each other, thereby creating magnetic forces parallel to the occlusal plane for urging the mandible forward.
According to U.S. Pat. No. 7,712,468, which discloses a removable magnetic dental appliance, the magnetic orthodontic devices described above employ “open field” magnetic configurations, which are potentially harmful to the local tissues in the oral cavity, especially since the devices are designed for long-term use. Furthermore, the appliances are uncomfortable to wear.
Any of the magnets discussed in these patent and publications would be useable in apparatus and kits disclosed herein.
If desired, fastening means may be employed to fasten one or more of the members in the users mouth. Hook and loop fasteners are common and require no further explanation. One preferred hook and loop fastener is that known under the trade designation Velcro®, available from Velcro USA, Manchester, N.H.
Although the foregoing description is intended to be representative of apparatus, kits, and methods in accordance with the present disclosure, it is not intended to in any way limit the scope of the appended claims.

## Claims

1. A mouth guard comprising at least one or both of an upper generally arched-shaped member and a lower generally arched-shaped member, wherein:
a) the upper generally arched-shaped member is configured to fit adjacent at least a portion of interior and exterior surfaces of a user's upper dentition, the upper generally arched-shaped member comprising a moldable polymeric material;
b) a lower generally arched-shaped member comprising the same or different moldable polymeric material that is configured to fit adjacent at least a portion of interior and exterior surfaces of a user's lower dentition;
c) the lower generally arch-shaped member comprising an posterior lower right molar extension and a posterior lower left molar extension each comprising the same or different moldable polymeric material, the posterior lower right and lower left molar extensions formed integrally with and projecting generally perpendicularly away from the lower generally arch-shaped member and generally toward the upper generally arch-shaped member;
d) the upper generally arch-shaped member comprising a posterior upper right molar extension and a posterior upper left molar extension each comprising the same or different moldable polymeric material, the posterior upper right and upper left molar extensions formed integrally with and projecting generally perpendicularly away from the upper generally arch-shaped member and generally toward the lower generally arch-shaped member;
e) so that when the user bites or clenches, the posterior upper right molar extension impinges on the posterior lower right molar extension, and the posterior upper left molar extension impinges on the posterior lower left molar extension;
f) the upper and lower generally arch-shaped members having an anterior shape to form a gap ranging from about 1 to about 20 mm and sufficient for at least a portion of the user's tongue to extend forward into the gap without being impeded in forward movement by the apparatus.

2. A method comprising:
a) inserting at least one of the upper and lower generally arch-shaped members of claim 1 into the user's mouth and fitting the upper generally arch-shaped member adjacent at least the portion of the interior and exterior surfaces of the user's upper dentition, and fitting the lower generally arch-shaped member adjacent at least the portion of the interior and exterior surfaces of the lower dentition; and
b) the user wearing at least one of the upper and the lower generally arch-shaped members as a mouth guard.

3. The method of claim 2 comprising adjusting the upper generally arch-shaped member to fit adjacent at least the portion of the interior and exterior surfaces of the user's upper dentition, or adjusting the lower generally arch-shaped member to fit adjacent at least the portion of the interior and exterior surfaces of user's lower dentition, or adjusting both.

4. A kit comprising at least one or both the upper and lower generally arch-shaped members of claim 1.

5. A mouth guard comprising at least one or both of an upper generally arched-shaped member and a lower generally arched-shaped member, wherein:
a) the upper generally arched-shaped member is configured to fit adjacent at least a portion of interior and exterior surfaces of a user's upper dentition, the upper generally arched-shaped member consisting of a moldable polymeric material;
b) the lower generally arched-shaped member consists of the same moldable polymeric material that is configured to fit adjacent at least a portion of interior and exterior surfaces of the user's lower dentition;
c) the lower generally arch-shaped member comprises a posterior lower right molar extension and a posterior lower left molar extension each consisting of the same moldable polymeric material, the posterior lower right and the posterior lower left molar extensions formed integrally with and projecting generally perpendicularly away from the lower generally arch-shaped member and generally toward the upper generally arch-shaped member;
d) the upper generally arch-shaped member comprises a posterior upper right molar extension and a posterior upper left molar extension consisting of the same moldable polymeric material, the posterior upper right and posterior upper left molar extensions formed integrally with and projecting generally perpendicularly away from the upper generally arch-shaped member and generally toward the lower generally arch-shaped member;
e) so that when the user bites or clenches, the posterior upper right molar extension impinges on the posterior lower right molar extension, and the posterior upper left molar extension impinges on the posterior lower left molar extension;
f) the upper and lower generally arch-shaped members having an anterior shape to form a gap ranging from about 5 to about 15 mm and sufficient for at least a portion of the user's tongue to extend forward into the gap without being impeded in forward movement by the apparatus;
g) the posterior lower right molar extension, posterior lower left molar extension, posterior upper right molar extension, and posterior upper left molar extension each configured such that, when the apparatus is in the user's mouth, the molar extensions create a tendency to keep the user's airway open by maintaining the gap.

6. The mouth guard of claim 5 wherein each molar extension has a lateral length of 10 mm or more.

7. The mouth guard of claim 5 wherein the molar extensions each have a vertical height of 5 mm or less.

8. A kit comprising at least one or both the upper and lower generally arch-shaped members of claim 5.

9. A method comprising:
a) inserting at least one or both of the upper and lower generally arch-shaped members of claim 5 into the user's mouth and fitting the upper generally arch-shaped member adjacent at least the portion of the interior and exterior surfaces of the user's upper dentition, and fitting the lower generally arch-shaped member adjacent at least the portion of the interior and exterior surfaces of the lower dentition; and
b) the user wearing at least one of the upper and the lower generally arch-shaped members as a mouth guard.

10. The method of claim 9 comprising adjusting the upper generally arch-shaped member to fit adjacent at least the portion of the interior and exterior surfaces of the user's upper dentition, or adjusting the lower generally arch-shaped member to fit adjacent at least the portion of the interior and exterior surfaces of user's lower dentition, or adjusting both.

11. A mouth guard comprising at least one or both of an upper generally arched-shaped member and a lower generally arched-shaped member, wherein:
a) the upper generally arched-shaped member is configured to fit adjacent at least a portion of interior and exterior surfaces of a user's upper dentition, the upper generally arched-shaped member consisting of a moldable polymeric material;
b) the lower generally arched-shaped member consisting of the moldable polymeric material that is configured to fit adjacent at least a portion of interior and exterior surfaces of the user's lower dentition;
c) the lower generally arch-shaped member consisting of a posterior lower right molar extension and a posterior lower left molar extension each consisting of the moldable polymeric material, the posterior lower right and the posterior lower left molar extensions projecting generally perpendicularly away from the lower generally arch-shaped member and generally toward the upper generally arch-shaped member;
d) the upper generally arch-shaped member consisting of a posterior upper right molar extension and a posterior upper left molar extension consisting of the moldable polymeric material, the posterior upper right and posterior upper left molar extensions projecting generally perpendicularly away from the upper generally arch-shaped member and generally toward the lower generally arch-shaped member;
e) so that when the user bites or clenches, the posterior upper right molar extension impinges on the posterior lower right molar extension, and the posterior upper left molar extension impinges on the posterior lower left molar extension;
f) the upper and lower generally arch-shaped members having an anterior shape to form a gap ranging from about 6 to about 8 mm sufficient for at least a portion of the user's tongue to extend forward into the gap without being impeded in forward movement by the apparatus;
g) the posterior lower right molar extension, posterior lower left molar extension, posterior upper right molar extension, and posterior upper left molar extension each configured such that, when the apparatus is in the user's mouth, the molar extensions create a tendency to keep the user's airway open by maintaining the gap.

12. The mouth guard of claim 11 wherein each molar extension has a lateral length of 10 mm or more or a vertical height of 5 mm or less.