Drug – bio-affecting and body treating compositions – Dentifrices – Fluorine or fluorine compound containing
Reexamination Certificate
2008-01-29
2008-01-29
Krass, Frederick (Department: 1614)
Drug, bio-affecting and body treating compositions
Dentifrices
Fluorine or fluorine compound containing
C424S057000, C424S401000, C424S435000, C433S215000, C433S217100, C433S226000, C433S228100, C501S024000, C501S025000, C501S057000, C501S058000, C501S063000, C501S072000, C106S035000
Reexamination Certificate
active
07323160
ABSTRACT:
A method of treating sensitive teeth includes (1) attaching a fluoride releasing glass composition to a person's tooth, and (2) allowing fluoride to be slowly released over time in order to reduce chronic and/or acute tooth sensitivity. A preferred glass composition comprises the general empirical formula given below, expressed in approximate weight percent of the element: P: 16-24, F: 5-30, O: 20-40 and at least one of Na, K, Li, or Al in an amount up to a total of about 40 weight percent and optionally, up to about 5 weight percent of boron and/or silicon.
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Chemical Abstract 92:153090, “Treatment of cervical hypersensitive dentin with glass ionomer cement” (1979).
K.J. Toumba, “Alleviation of Dentine Sensitivity Using Glass Slow-Release Fluoride Devices: A Pilot Study.” Division of Child Dental Health. Leeds Dental Institute, Leeds, U.K. Published Jun. 10, 2003.
Algar Brian
Curzon Martin
Toumba Jack
Krass Frederick
Teldent Ltd.
Workman Nydegger
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