Patent ID: 8205618

Claim:
A mouthguard comprising: an upper portion in the form of a u-shaped channel having an inner wall, an outer wall and a floor, said floor of said u-shaped channel defining a plurality of holes; a lower platform having a u-shaped base and a plurality of posts distributed on said u-shaped base and extending therefrom; and, a filler material molded to the inside of said u-shaped channel of said upper portion; wherein said each of said plurality of posts is aligned with one of said plurality of holes such that at least a portion of the length of each of said plurality of said posts extends through said aligned hole when said lower platform is joined with said upper portion; at least one undercut segment in direct contact with and extending from said u-shaped base of said lower platform and surrounding at least one of said plurality of posts and wherein each of said at least one undercut segments is positioned between said upper portion and said base of said lower platform when said lower platform is joined with said upper portion; wherein the height of said at least one of said plurality of posts measured from said u-shaped base of said lower platform to the end of said at least one post of said plurality of posts is higher than the height of said at least one undercut segment that surrounds said at least one of said plurality of posts measured from said u-shaped base of said lower platform; at least one perimeter groove, wherein each of said at least one perimeter grooves is cut into said bottom surface of said floor of said upper portion around one of said plurality of holes so as to surround one of said plurality of holes, each of said at least one perimeter grooves having a depth less than said each one of said plurality of holes such that each of said at least one undercut segments fits into one of said at least one perimeter grooves when said lower platform is joined with said upper portion; wherein a groove is molded into a bottom surface of said floor of said u-shaped channel of said upper portion.