| 摘要 |
A method and apparatus for whitening teeth includes a source of oxidizing gas (12) and a handpiece (16) for delivering the gas to the tooth (40). A cup (34) attached to the handpiece (16) is provided for receiving the gas and exposing a selected area of the tooth (40) to the gas. The cup (34) includes a resilient edge (44) for sealing the edge (44) for engaging the tooth (40) around the selected area to prevent escape of a gas. |
