Espe, Fabrik Pharmazeutischer Praparate Gmbh

Espe Stiftung & Co. Produktions- Und Vertriebs Kg

Espe Fabrik Parmazeutischer Praparate G.m.b.h.

Other

Thera Patent Gmbh & Co. Kg

Espe Stiftung & Co. Produktion- Und Vertriebs Kg

501 Espe Stiftung & Co. Produktions-Und

Abitz, Morf, Gritschneder

Espe Stiftung & Co. Produktions

Peter Jochum

Werner Schmitt

Robert Purrmann

Oswald Gasser

Klaus Ellrich

Rainer A Guggenberger

Wolf-Dietrich Zahler

Gunther Lechner

Heinz-Joachim Hubner

Wolf-Dieter Zahler

Erich Wanek

Heijo Hubner

Rainer Grimm-Lenz

Manfred Holupirek

Klaus-Peter Stefan

Bernd Burger

Christian Herzig

Wolf Dieter Zahler

Robert Purrman

Dental compositions based on an bifunctional or polyfunctional acrylic-acid and/or methacrylic-acid esters, which contain an initiator system for radical polymerization and which additionally contain a compound of the general formula ##STR1## in which: Ar represents aryl or substituted aryl,

Dental compositions comprising bifunctional or polyfunctional

Dental compositions based on an at least bifunctional or polyfunctional acrylic-acid and/or methacrylic-acid esters, which contain an initiator system for radical polymerization and which additionally contain a compound of the general formula ##STR1## in which: Ar represents aryl or substituted aryl,

The invention relates to photopolymerizable dental compositions of ethylenically unsaturated monomers and/or polymers thereof which are curable in two curing steps. Besides being comprised of fillers, said compositions also contain a photoinitiator component I having a light absorption maximum of &lt;450 nm and a molar extinction of the light absorption of &lt;10 at wavelengths of 470 nm or higher, and a photoinitiator component II having a molar extinction of the light absorption of &gt;20 at least at one wavelength of at least &gt;450 nm.

Two-stage photocuring process for a dental composition

Open-pored moldings containing the product of the foaming and setting of (a) an aluminum fluorosilicate glass, (b) at least one polycarboxylic acid with an average molecular weight of &gt;500, (c) a foaming agent, other than carbonates and/or hydrogen-carbonates, (d) optionally a chelating agent and (e) water, are suitable in particular as bone substitute material. Production is carried out by homogeneously mixing (a), (b), (c), optionally (d), and (e), then foaming, shaping and setting.

Open-pored moldings, a process for their production and use thereof

Photopolymerizable dental compositions are proposed which are curable with visible light and which apart from usual auxiliary substances and additives contain polymerizable monomers of the group of the poly-thiol compounds and of the group of the poly-ene compounds and a photoinitiator and which, in order to obtain a curing free from any smeary layer, contain at least 10% by weight poly-thiol compound(s), at least 10% by weight poly-ene compound(s) and 0.01 to 5% by weight of at least one acyl phosphine compound as photoinitiator. The compositions can advantageously be used as dental impression compositions.

(Polyene-polythiol) dental compositions curable with visible light

A polyether-impression material comprising components

Polyether-impression material and method for its preparation and use

An ionogenic compound, soluble or dispersible in aziridine compounds is utilized for delaying the polymerization of aziridine compounds initiated by a sulfonium salt. Said ionogenic compounds contain an anion which is more nucleophilic than the anion present in the sulfonium salt employed. Moreover, a preparation for dental purposes is described which contains these components.

Dental composition containing an aziridine compound and method of

(Methy)acrylic acid esters of the general formula

(Meth)acrylic acid esters and the use thereof for preparing dental

Polyvinyl butyral with a degree of acetalization of at least 75% is added to a dental cement on basis of calcium hydroxide and salicyclic esters of aliphatic alcohols. By this additive improved water resistance and increased compressive strength upon hardening are imparted to the dental cement. The obtained dental cement furthermore has strongly alkaline pH value, so that an effective protection of the pulp can be achieved and formation of a secondary dentin layer is stimulated. In the common formulation of the materials for the dental cement in form of two separate mixing components the polyvinyl butyral can be added either to the mixing component containing the salicylic acid ester or to the mixing component containing the calcium hydroxide, or also to both components.

Dental cement containing polyvinyl butyral as an additive

Imidazoles in dissolved form act as an agent for retarding the gelation of the polymerization of aziridine compounds initiated with sulfonium salts. The composition is particularly useful in dentistry applications, such as in the preparation of impressions and provisional denture parts.

Imidazole agent for retarding the polymerization of aziridine compounds

Impression materials based on cross-linked aziridino-polyester compounds which tend to adhere to the surface to be reproduced, are made nonadhesive by the addition of 1-15% by weight of oleic acid ethanolamide with respect to the aziridino-polyether component, and may thereafter be more easily and smoothly released from the object to be reproduced.

Nonadhesive impression material

1,2,6-Thiadiazine-3,5-dione-1,1-dioxides of the general formula ##STR1## wherein each R and R.sub.3 independently may be substituted or unsubstituted alkyl, alkenyl or substituted cycloalkyl are described. These compounds, as well as those wherein the R substituents additionally may be cycloalkyl or substituted or unsubstituted aryl, are useful as accelerators for the peroxidic polymerization of ethylenically unsaturated compounds, such as methacrylic acid compounds, and have particular utility in dental compositions.

1,2,6-Thiadiazine-3,5-dione-1,1-dioxides and their use as polymerization

Use of agglomerates of silicic acid as fillers in dental materials

A calcium aluminum fluorosilicate glass powder is disclosed which has average particle size of at least 0.5 microns, and is characterized in that the calcium in the surface of the powder's particles is depleted so that the quotient of the atomic ratio Si/Ca at the surface of the particles and the atomic ratio Si/Ca in the core region of the particles is at least 2.0, more preferably at least 3.0 and most preferably at least 4.0. The glass powder may be prepared by surface treating calcium aluminum fluorosilicate glass powder particles with an acid which forms calcium salts, washing the calcium salts off the treated particles and drying the washed particles. The glass powder has utility in self-hardening glass ionomer cements, such as dental or bone cements. Cements formed from the glass powder exhibit reduced periods of water sensitivity, while permitting sufficient time for processing.

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Hechendorf, Germany

Peter Jochum