| 摘要 |
1,131,753. A tooth-shield for dentistry. C. A. GROSS. 22 June, 1966 [29 June, 1965], No. 27995/66. Heading A5R. A device for keeping dry an operational area in dentistry comprises a rubber sheet 1 provided on each side with a layer 2 of saliva- and liquid-absorbing material, the absorbing layers each having an aperture, the apertures at least partly overlapping each other so that a part of the rubber sheet is exposed on both sides. As shown, the rubber sheet 1 is heatsealed between two layers 2 of paper impregnated with a plastics material, the uppermost layer 2 having an aperture bordered by liquidreceiving pockets 3 and the lower layer 2 (see Figure 2, not shown) having an aperture of smaller size. In use, a cut is made in the exposed portion of the rubber sheet and the device is fitted over a tooth with the layer 2 having the pockets 3 uppermost, and secured to the patient's ears by elastic loops 4. |
