Inert dental glass

US7264665B2 · kind B2 · utility

Assignee

• 3M ESPE AG · DE

Inventors

• Stefan Hoescheler · Munich, DE
• Markus Mikulla · Cham, DE
• Gabriele Rackelmann · Gilching, DE
• Volker Bambach · Soest, DE

Key dates

• Filing date: Dec 13, 2001
• Grant date: Sep 4, 2007
• Expiry date: Dec 13, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C3/095
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to the use of ions of weakly basic oxides as linking ions for polyacids in cements, preferably polyelectrolyte cements. Suitable ions comprise elements of the scandium series, for example, Sc3+, Y3+, La3+, Ce4+ and all subsequent tri- and tetra-valent lanthanides and the ions Mg2+, Zn2+, Ga2+, In2+. The application of said ions permits a regulation of the cement reaction without surface treatment of the glass powder.