A mouthpiece is disclosed which comprises an inner layer material (2, 2a, 2b) put on an inside surface of an outer layer material (1) which is substantially U-shaped so as to cover a row of teeth in a loosely fitted state. The inner layer material comprises an ethylene vinyl-acetate copolymer having a softening point higher than an ordinary temperature in an oral cavity and lower than the highest temperature that an oral cavity can endure. The outer layer material comprises a synthetic resin harmless to a human body and having a softening point higher than the softening point of the inner layer material.
1. A mouthpiece comprising an inner layer material put on an inside surface of an outer layer material which is substantially U-shaped so as to cover a row of teeth in a loosely fitted state, said inner layer material comprising an ethylene vinyl-acetate copolymer having a softening point higher than an ordinary temperature in an oral cavity and lower than the highest temperature that an oral cavity can endure, said outer layer material comprising a synthetic resin harmless to a human body and having a softening point higher than the softening point of said inner layer material.
+FIELD OF THE INVENTION The present invention relates to a mouthpiece which is used to protect jaw bone, teeth, and an oral cavity from external force in an contact sport such as rugby football, boxing, or the like, which is used to protect teeth from gnashing in bed.
+BACKGROUND OF THE INVENTION +(1) Mouthpieces of the completed type: +(2) Mouthpieces of the oral-cavity molded type: +(3) Mouthpieces of the custom-made type: +SUMMARY OF THE INVENTION +Brief Description of the Drawings +DETAILED DESCRIPTION OF THE INVENTION +EXAMPLE 1 +EXAMPLE 2
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