Mouthpiece and method for producing the same.

摘要

A mouthpiece comprising an ethylene-vinyl acetate copolymer having a vinyl acetate content of from 12 to 33 wt%, and the process for producing the same comprising the steps of: preparing a thermoplastic elastic sheet material formed to be increased in thickness from one end to the other end; preparing a teeth impression cast of a user who is going to use a mouthpiece to be produced; and pressing said teeth impression cast against said thermoplastic elastic sheet material in a softened state so as to transfer a shape of said teeth of said user onto said thermoplastic elastic sheet material to thereby obtain a mouthpiece which is set to be thicker at a portion corresponding to a front teeth posi tion than at a portion corresponding to a molar teeth position.