Schott Ag

Schott Glas

Susanne Kessler

Christian Kunert

Jose Zimmer

Jörg Hinrich Fechner

Hartmut Paschke

Sean Lee

Joern Besinger

José Zimmer

Matthias Rindt

Johann Daimer

Hans-Werner Beudt

Karine Seneschal-Merz

Karine Seneschal

Susanne Kiermayer

Ute Wolfel

Alwin Weitzel

A glass powder or a glass-ceramic powder is provided that includes multicomponent glasses with at least three elements, where the glass powder or a glass-ceramic powder has a mean particle size of less than 1 &#x3bc;m. In some embodiments, the mean particle size is less than 0.1 &#x3bc;m, while in other embodiments the mean particle size is less than 10 nm.

Nano glass powder and use thereof, in particular multicomponent glass powder with a mean particle size of less than 1 &#x3bc;m

The method of preserving a perishable cosmetic and/or pharmaceutical preparation includes adding bioactive glass particles to the preparation, preferably in amounts up to 10 percent by weight. The bioactive glass particles preferably have particle sizes (d) less than or equal to 10 &#x3bc;m and contain from 40 to 60 wt. % SiO, 10 to 30 wt. % CaO, 10 to 35 wt. % NaO, 2 to 8 wt. % PO, 0 to 25 wt. % CaF, 0 to 10 wt. % BO, 0 to 8 wt. % KO and/or 0 to 5 wt. % MgO. A liquid cosmetic preparation with alcohol content insufficient for preservation is preserved in an inconspicuous manner by adding bioactive glass particles with particle sizes less than or equal to 10 &#x3bc;m and with a refractive index close enough to that of the liquid cosmetic preparation so that bioactive glass particles are substantially invisible to an observer.

Preservatives for perishable preparations, in particular for cosmetic and pharmaceutical preparations

The dental filling material for a permanent dental filling contains up to 87 percent by weight of a mixture of bioactive glass particles capable of forming a hydroxylapatite layer and conventional non-bioactive dental glass particles surrounded or embedded in a matrix material. The glass particles have an average particle size (d) less than 50 &#x3bc;m. When the index of refraction of the glass particles at least approximately matches the index of refraction of the matrix material a particularly attractive appearance results when the resulting filling material is used to make a dental filling. When the bioactive glass particles contain fluoride, protection against further caries is provided. The invention also includes a method of making the dental filling material, the dental filling made with it and a binder for binding the dental filling to a tooth.

Use of bioactive glass in dental filling material

The invention relates to a glass powder, where at least one oxidizing agent or one reducing agent is added to the glass powder. The glass powder is preferably used as dental glass powder.

Glass powder and use thereof

The invention relates to a barium-free, X-ray-opaque dental glass, to a dental glass/polymer composite comprising the glass, and to the use thereof as dental filling, where the dental glass has the following composition (in % by weight): SiO,20-45, Al,O,5-35, B,O,1-10, Na,O 1-10, K,O 0-8, Cs,O 0-8, sum all alkali metal oxides 1-15, CaO 0-8, SrO 0-27, ZnO 2-20, ZrO,2-10, P,O,0-10, La,O,0-10, F 2-20, the total content of B,O,, ZnO, ZrO,and La,O,is >20% by weight, and the refractive index n,of the dental glass is in the range from 1.47 to 1.70.

Barium-free, X-ray-opaque dental glass and dental glass/polymer composite, and the use thereof

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Ergolding, Germany

Susanne Kessler