Use of ozone to whiten teeth

Dentistry – Method or material for testing – treating – restoring – or... – Cleaning

Reexamination Certificate

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Reexamination Certificate

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06877985

ABSTRACT:
Method and apparatus for the whiting of teeth includes a source of oxidizing gas and a handpiece for delivering the gas to a tooth. A cup attached to the handpiece is provided for receiving the gas and exposing a selected area of the tooth to the gas. The cup includes a resilient edge for sealably the edge for engaging the tooth around the selected area to prevent escape of a gas therepast.

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patent: 20020172707 (2002-11-01), Joyce
patent: 3825824 (1990-02-01), None
patent: WO 9964020 (1999-12-01), None

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