| 摘要 |
A resilient composition including a thermoplastic material and gas pockets dispersed therein, where the pockets being formed by a blowing agent. A mouthpiece including a resilient thermoplastic material having a quantity of gas pockets dispersed therein. A method of making a mouthpiece achieved by first mixing a predetermined quantity of blowing agent with a resilient thermoplastic material. The mixture is then heated to a predetermined temperature forming gas pockets therein from the decomposition of the blowing agent. The mixture is then ejection molded in a mold to form the mouthpiece. A mouthpiece including a U-shaped base having a U-shaped cross-section. The base including a lower, horizontal floor with upwardly extending inner lingual and outer labial walls and having a posterior section proximate the user's molar teeth and an anterior section proximate the user's canine and incisor teeth. The mouthpiece further including a continuous ridge integral with the base and having an outer horizontal portion disposed on the exterior surface of the outer labial wall of the anterior section and terminating in opposite inner horizontal portions disposed on the interior surface of the horizontal floor of the posterior section. The mouthpiece may be formed from a resilient thermoplastic composition having a quantity of gas pockets dispersed therein.
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