| 摘要 |
A mouthpiece which has a simple structure, is therefore easy to machine for adjustment, and is extremely inexpensive. The mouthpiece (1) comprises an upper piece (2) to be fitted to the upper jaw dentition, and a lower piece ( 3) vertically opposed to the upper piece (2) and to be fitted to the lower jaw dentition. Projections (6, 7) are provided on the opposed surface of one of the upper and lower pieces (2, 3) and project toward the other piece, and a supporting surface (10) for supporting the projections (6, 7) when it comes in contact therewith. An upper dentition fitting groove (5) for fitting the upp er piece (2) to the upper-jaw dentition is formed in the upper surface of the upper piece (2), and a lower dentition fitting groove for fitting the lower piece (3) to the lower-jaw dentition is formed in the lower surface of the lower piece (3).
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