Heraeus Kulzer Gmbh

Detlef Heindl

Oskar Nuyken

Roland Schaefer

Dieter Schodel

Albert Erdrich

Joachim Fritze

Regina Eppinger

Bernhard Eppinger

Peter J Kohler

Christoph Erdmann

Ralf Bohner

Porous silicon dioxide glass is proposed as an inorganic filler for polymerizable materials, which has a particle size of 0.5-50 micrometers, a pore size of 20-120 nanometers, a pore volume of 200-1000 mm.sup.3 /g and a BET surface area of 10-100 m.sup.2 /g. The polymer products containing the filler are characterized by a very good resistance to abrasion.

Filler based on silicon dioxide, method for its preparation, and its use

Polymerizable materials that contain 'oxetanes' (trimethylene oxides) shrink only slightly when polymerized in the presence of a cationic polymerization catalyst. The materials are particular appropriate for coatings and for medical and dental purposes.

Polymerizable material

Radiopaque, abrasion-resistant tooth fillings and inlays that can be polished to a high gloss can be made from a dental material that, in addition to monomeric dimethacrylates, contains a filler mixture of 80 to 90 weight % barium aluminum silicate glass, having a mean particle size of 0.5 to 1.5 .mu.m, and 10 to 20 % weight silicon dioxide, having a mean particle size of 0.04 to 0.06 .mu.m. The dental material is also suitable for anchoring dental prostheses.

Polymerizable dental material

Growing community of inventors

Weinbach, Germany

Detlef Heindl