Formable composition and its use as filling material for dental root canals

US5520922A · kind A · utility

Assignee

• Thera Patent GmbH & Co KG Gesellschaft fur Industrielle Schutzrechte · DE

Inventors

• Oswald Gasser · Hanerau-Hademarschen, DE
• Rainer Guggenberger · Hanerau-Hademarschen, DE

Key dates

• Filing date: Oct 18, 1994
• Grant date: May 28, 1996
• Expiry date: Oct 18, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/00836
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

There are provided formable compositions which comprise: (A) 25 to 80% by weight of a glass ionomer cement, containing (a) an aluminum fluorosilicate glass, (b) at least one polymeric polyacid with an average molecular weight >500, (c) water and (d) optionally a chelating agent; (B) and 20 to 75% by weight of a fluoride and/or oxide and/or mixed fluoride and/or mixed oxide of heavy metal elements which are essentially insoluble at ambient temperatures in an aqueous solution containing the polymeric polyacid and/or an aqueous solution containing the chelating agent. The compositions are especially well suited as filling materials for dental root canals.