| 摘要 |
A device having an outer marginal area for clenched retention between the upper and lower teeth. Tongue supporting members extend inwardly and upwardly from the marginal area to properly position the tongue with the tongue tip in contact with the upper alveolar ridge of the gum. Openings permit passage of saliva through the device. Projections, on a modified form of the device, cause tongue discomfort if the tongue is improperly located below the device.
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