Cationically curable dental materials

US7098259B2 · kind B2 · utility

Assignee

• 3M ESPE AG · DE

Inventors

• Stefan Hoescheler · Munich, DE
• Wolfgang Weinmann · Gilching, DE
• Andrea Stippschild · Landsberg, DE
• Susanne Wegner · Künzelsau, DE

Key dates

• Filing date: Jan 8, 2002
• Grant date: Aug 29, 2006
• Expiry date: Jan 8, 2022

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K6/893
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to a polymerizable dental material containing: (a) 3 to 80 wt. % of one or more cationically curable monomers; (b) 3 to 90 wt. % of one or more radio-opaque fillers; (c) 0.01 to 25 wt. % of initiators, retarders and/or accelerators, and; (d) 0 to 25 wt. % of auxiliary agents, whereby the cited percentages each refer to the total weight of the material. Filler (b) is produced by means of a melting method and is selected so that it has a refractive index of nD=1.49–1.54, so that the viscosity of the polymerizable dental material, after a period of at least 9 months during which it was stored at a temperature ranging from 20 to 25° C., has a value of +/−50 % of the initial value measured 24 hours after the polymerizable dental material was produced, and so that the polymerizable dental material has a reactivity of the type that, once polymerization is initiated, the amount of the maximum heat flux generated by the dental material equals at least 0.8 mW/mg, and this maximum heat flux is attained within a period of no longer than 60s.