| 摘要 |
A dental prophylaxis device including a rotary pliable cup-shaped tooth-engaging member formed with paste-impelling patterns on its outside walls which urge the paste toward the tooth under the effects of rotation, and a resilient wiper finger attached to the handpiece which drives the pliable cup adapted to wipe against the side wall of the cup above the tooth surface and capable of yielding with distortion of the cup under pressure against the tooth, thus preventing migration of paste backward toward the driving mechanism and further precluding buildup of paste and saliva on the outside walls preventing splattering.
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