# US 9,517,400 B2 · Custom-formable mouth guard and method of fabrication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,517,400 B2 - Document ID: US9517400B2 - Status: Granted - Kind: B2 - Application number: 12/228,179 - Filed: 2008-08-11 - Published: 2009-02-12 - Granted: 2016-12-13 - Earliest claimed: 2007-08-09 - Assignees: Akervall Technologies, Inc. - Applicants: Jan Akervall; Johann Schwank - Inventors: Jan Akervall; Johann Schwank - Web page: https://patentgrep.com/patent/US9517400B2 ## CPC - A63B 71/085: {Mouth or teeth protectors (A63B71/081 takes precedence)} - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) ## Abstract A mouth guard composed of a polymer consisting essentially of polycaprolactone exhibits a low softening point, enabling it to be easily custom-fitted by the user or a health professional. The material is provided in the form of a generally U-shaped, unformed sheet of material, enabling the material to be heated with hot water or microwave energy and custom-fitted to the dentition of a user. The mouth guard may be perforated and may include a no-stick layer and/or a flavoring agent. A plurality of mouth guards may be provided in different sizes for children and adults and different shapes for different sports. In the preferred embodiments the mouth guard has a periphery including a plurality of lobes and cusps to enhance fitting. A method of fabricating an improved mouth guard according to the invention is also disclosed. ## Claims ### Claim 1 An improved mouth guard, comprising: a sheet of material composed of a thermoplastic polymer, enabling the sheet to be heated with hot water or microwave energy; the sheet having an arc-shaped bite line, the arc-shaped bite line divides the sheet into a first area of material entirely on one side of the arc-shaped bite line and a second area of material entirely on another side of the arc-shaped bite line, wherein the first and second areas each have a plurality of closely spaced perforations which penetrate entirely through the sheet, wherein said perforations laterally deform with an impact; a first unperforated V-shaped area of material located across said arc-shaped bite line to bound a greater number of perforations in said first area than said second area; and a second unperforated area of material between said first and second areas and within said V-shaped area and said arc-shaped bite line. ### Claim 2 (depends on 1) The improved mouth guard of claim 1, wherein said unperforated V-shaped area is located through said bite line. ### Claim 3 (depends on 2) The improved mouth guard of claim 2, wherein said unperforated V-shaped area is widest in said first area and narrowest in said second area so that more perforations are bounded in said first area than said second area. ### Claim 4 (depends on 2) The improved mouth guard of claim 2, wherein said unperforated V-shaped area extends to a rear gum line but is blocked from a forward gum line by some of said perforations, wherein one leg of said V-shaped area is blocked by more perforations than another leg of said V-shaped area. ### Claim 5 (depends on 1) The improved mouth guard of claim 1, wherein there are fewer perforations above a gum line of said sheet than below said gum line. ### Claim 6 (depends on 5) The improved mouth guard of claim 5, wherein a plurality of rows of perforations are located in said first area between said arc-shaped bite line and a cusp area and a plurality of rows of perforations are located in said second area between said arc-shaped bite line and said gum line. ### Claim 7 (depends on 1) The improved mouth guard of claim 1, wherein the sheet of material has a thickness in the range of 1-5 mm. ### Claim 8 (depends on 1) The improved mouth guard of claim 1, wherein the mouth guard further includes a no-stick layer. ### Claim 9 (depends on 1) The improved mouth guard of claim 1, further including a flavoring agent. ### Claim 10 (depends on 1) The improved mouth guard of claim 1, including a plurality of material sheets provided in different sizes for children and adults and different sports. ### Claim 11 (depends on 1) The improved mouth guard of claim 1, wherein the sheet of material has a periphery including a plurality of lobes and cusps to enhance fitting and impact force dissipation. ### Claim 12 (depends on 1) The improved mouth guard of claim 1, wherein the thermoplastic polymer is polycaprolactone. ### Claim 13 (depends on 1) The improved mouth guard of claim 1, wherein the unfitted sheet has a thickness on the order of 1-5 mm. ### Claim 14 (depends on 1) The improved mouth guard of claim 1, wherein the unfitted sheet has a thickness on the order of 1.6 mm. ### Claim 15 (depends on 1) The improved mouth guard of claim 1, wherein the unfitted sheet of material is thin and substantially flat prior to heating and fitting. ### Claim 16 (depends on 1) The improved mouth guard of claim 1, wherein said lateral deformation of said perforations comprises shape and diameter changes of said perforations. ### Claim 17 (depends on 1) The improved mouth guard of claim 1, wherein there are fewer perforations in said bite line compared with said areas on said sides of said bite line. ### Claim 18 A method of fabricating an improved mouth guard, comprising: providing an unfitted sheet of material composed of a thermoplastic polymer enabling the sheet to be heated with hot water or microwave energy, the sheet having an arc-shaped bite line, wherein the arc-shaped bite line has a first area of material entirely on one side of the arc-shaped bite line and a second area of material entirely on another side of the arc-shaped bite line, locating a plurality of closely spaced perforations which penetrate entirely through the sheet in both the first and second areas, wherein said perforations laterally deform with an impact, and providing a first unperforated V-shaped area of material across said arc-shaped bite line to bound a greater number of perforations in said first area than said second area, providing a second unperforated area of material between said first and second areas and within said V-shaped area and said arc-shaped bite line; heating the sheet so that the material becomes soft and pliable; and allowing the material to harden in a custom-fitted shape. ### Claim 19 (depends on 18) The method of claim 18, wherein the material is heated by immersion in hot water or other hot liquids. ### Claim 20 (depends on 18) The method of claim 18, wherein the material is heated with microwave energy. ### Claim 21 (depends on 18) The method of claim 18, further including the step of re-heating and re-forming the material if needed. ### Claim 22 An improved mouth guard, comprising: a sheet of material having an arc-shaped bite line, said arc-shaped bite line divides the sheet into a first area of material entirely on one side of the arc-shaped bite line and a second area of material entirely on another side of the arc-shaped bite line, wherein the first and second areas each have a plurality of closely spaced perforations which penetrate entirely through the sheet, wherein an unperforated V-shaped area of material extends from said first area, across said bite line and into said second area, wherein said unperforated V-shaped area is widest in said first area and narrowest in said second area to bound a greater number of perforations in said first area compared with said second area, an imaginary centerline of said sheet of material extending through said arc-shaped bite line to divide said sheet, and said unperforated V-shaped area, in half, wherein an unequal number of perforations are located on one half of said imaginary centerline compared with the other half. ### Claim 23 (depends on 22) The improved mouth guard of claim 22, wherein a first row of perforations in said first area directly adjacent a cusp area has three perforations on one side of said centerline and four perforations on the other side of said centerline. ### Claim 24 An improved mouth guard, comprising: a sheet of material having an arc-shaped bite line, and a plurality of closely spaced perforations which penetrate entirely through the sheet, wherein said perforations laterally deform with an impact, an unperforated V-shaped area of material between said perforations on said arc-shaped bite line, an imaginary centerline of said sheet of material extending through said perforations, through said unperforated V-shaped area of material, and through said arc-shaped bite line to divide said sheet in half, wherein an unequal number of perforations are located on one half of said imaginary centerline compared with the other half.