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Method and product for phosphosilicate slurry for use in dentistry and related bone cements

United States Patent

August 1, 2006
View the Complete Patent at the US Patent & Trademark Office
Argonne National Laboratory - Visit the Technology Development and Commercialization Website
The present invention is directed to magnesium phosphate ceramics and their methods of manufacture. The composition of the invention is produced by combining a mixture of a substantially dry powder component with a liquid component. The substantially dry powder component comprises a sparsely soluble oxide powder, an alkali metal phosphate powder, a sparsely soluble silicate powder, with the balance of the substantially dry powder component comprising at least one powder selected from the group consisting of bioactive powders, biocompatible powders, fluorescent powders, fluoride releasing powders, and radiopaque powders. The liquid component comprises a pH modifying agent, a monovalent alkali metal phosphate in aqueous solution, the balance of the liquid component being water. The use of calcined magnesium oxide as the oxide powder and hydroxylapatite as the bioactive powder produces a self-setting ceramic that is particularly suited for use in dental and orthopedic applications.
Wagh; Arun S. (Naperville, IL), Primus; Carolyn (Bradenton, FL)
Dentsply International, Inc. (York, PA), University of Chicago (Chicago, IL)
10/ 913,185
August 6, 2004
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH This invention was made with government support under Contract W-31-109-ENG-38 awarded by the Department of Energy. The Government has certain rights in this invention.