| 摘要 |
A dental prophy cup (10) comprises a flexible body having a cavity formed therein. A rear end of the cavity (22) includes a paste reservoir (26) for storing an abrasive paste. Paste-delivery channels (28) extend forwardly from the reservoir (26) and intersect front and rear circumferentially extending paste-distribution channels (30, 32). Under the action of centrifugal force occurring during a tooth-cleaning procedure, paste is fed forwardly along the delivery channels (28) and is distributed within the distribution channels (30, 32). Between the channels is disposed a pattern of ridges (34, 36) which are capable of flexing relative to one another to conform to the shape of a tooth surface.
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