Abstract: Polymerizable and hydrolysable oxetane silanes and in particular silicic acid condensates which can be prepared therefrom are described, which exhibit only a low volume shrinkage on polymerization and produce polymers with high mechanical strength and therefore can be used above all as dental material or constituent thereof.

Abstract: An oven particularly suitable for dental materials is provided with a firing plate on which a calibration apparatus can be removably located. The calibration apparatus includes a meltable element whose melting is detectable by a detecting device. The calibration apparatus is additionally provided with a control device. The firing plate includes a device for receiving therein the calibration apparatus including a non-electrically conducting support for supporting two electrically conducting contact posts of the calibration apparatus.

Abstract: An apatite glass ceramic is described which is characterized by good chemical stability, a low expansion coefficient and high translucence, and is particularly suitable, by itself or together with glasses or other glass ceramics, as a veneering material for ceramic dental restorations.

Abstract: The invention relates to a dental material with at least one polymerizable binder and at least one filler containing a redox-initiator system for the radical polymerization, which comprises an initiator and an activator. The material is characterized in that the filler contains a homogeneous mixture of a first part of the filler, which is mixed with the initiator, a second part of the filler, which is mixed with the activator, and a third part of the filler, which does not contain a component of the initiator system. The materials are particularly suitable as cements and filling materials.

Abstract: The use of a photopolymerizable composition containing methacrylate and filler as decoration of metallic ornaments is described, in which the composition is applied to the article to be decorated and is photopolymerized.

Abstract: An apatite glass ceramic is described which is characterized by good chemical stability, a low expansion coefficient and high translucence, and is particularly suitable, by itself or together with glasses or other glass ceramics, as a veneering material for ceramic dental restorations.

Abstract: The invention relates to ion-releasing composite materials on the basis of polymerizable monomers. The material is characterized in that it contains one or more non-acid, non-ionic, hydrophilic crosslinker monomers, one or more non-acid, non-ionic, hydrophilic dilution monomers having a viscosity of ≦1 Pas and at least one ion-releasing filler. The materials are suitable in particular for use as dental materials.

Abstract: Hydrolysis-stable and polymerizable acrylphosphonic acids are described which are particularly suitable as a component of dental adhesives owing to their adhesion-promoting properties.

Abstract: An apparatus for dispensing a viscous compound has a dispensing device and a sleeve having a first end detachably connected to the dispensing device. The dispensing device has a plunger and a rotary drive acting on the plunger for applying pressure onto the viscous compound contained in a container attached to the dispensing device for dispensing the viscous compound. The dispensing device has an actuator that couples the rotary drive to the plunger. When the sleeve is attached to the dispensing device, the actuator allows movement of the plunger in the dispensing direction of the dispensing device upon actuation of the rotary drive.

Abstract: A color key for selecting a proper color for artificial teeth has a base with receiving sockets and insert members having a first end and a second end. The first end is receivable in the sockets. Sample elements are provided whereby each one of the insert elements has one of the sample elements connected to the second end. The sample elements consist of and are produced in the same manner as the dental replacements. The sample elements have a first surface and a second surface, wherein the first surface has a texture matching the texture of a natural tooth and a curvature matching the curvature of a natural tooth. The second surface is flat and smooth.

Abstract: The invention relates to vinylcyclopropane derivatives according to the formula ##STR1## in which A is --[--Y--CO--C(.dbd.CH.sub.2)R.sup.4 ].sub.m or --C(.dbd.CH.sub.2)CO--O--C.sub.1-4 -alkyl, U and X, independently of each other, stand for CO, COO or CONH; Y and Z stand for O or NH or are absent, but Y and Z cannot be absent at the same time; n, m stand for a whole number from 0 to 4, but n and m are not 0 at the same time; R.sup.1 is H, CH.sub.3 or Cl; R.sup.2, R.sup.3 stand for H, a C.sub.1 - to C.sub.10 -alkyl or alkylene radical, which can be interrupted by O, S or NH, for a C.sub.6 - to C.sub.14 -aryl or arylene, C.sub.7 - to C.sub.14 -alkylaryl or alkylarylene or a C.sub.5 - to C.sub.8 -cycloalkyl or cycloalkylene radical; and R.sup.4 is H or a C.sub.1 - to C.sub.10 -alkyl radical, and to processes for their production. The compounds are suitable in particular for the production of adhesives, cements, composites and mouldings.

Abstract: Alkali silicate glasses are described which, in view of their good chemical stability and their optical properties and processing properties, are particularly suitable as a coating or veneering material for ceramic dental frameworks and hence for the production of all-ceramic dental restorations such as crowns or bridges.

Abstract: Polymerizable and hydrolysable oxetane silanes and in particular silicic acid condensates which can be prepared therefrom are described, which exhibit only a low volume shrinkage on polymerization and produce polymers with high mechanical strength and therefore can be used above all as dental material or constituent thereof.

Abstract: A curing device for curing dental materials by light-induced polymerization has a supply station and a hand-held apparatus including a light source. A detachable cable connects the hand-held apparatus to the supply station. An output control device controls the light source in order to ensure a uniform light intensity, wherein the output control device has a preset nominal output. The output control device includes a control FET. The cable is connected within the output control device. The output control device prevents switching on the curing device or emits a warning signal when the nominal output requires a voltage, surpassing a control bias voltage minus a potential difference of the control FET, or a corresponding current.

Abstract: A dental matrix for filling a lateral tooth cavity has a strip to be placed about a tooth. A wedge for applying pressure to a gap between adjacent teeth is provided. A joint connecting the wedge to the strip is provided. The wedge is moveable from a rest position into a working position by moving the wedge relative to the strip about the joint.

Abstract: In a light curing device which is especially suitable for light-induced polymerization of dental material in the mouth of a patient, a light source is provided which is housed together with a reflector in the hand-held device together with a cooling fan. The reflector reflects the radiation emitted by the light source. The light source is supported within a substantially dust-tight light source casing having cooling ribs provided at its exterior.

Abstract: The invention relates to dental materials based on wax-like polymerizable substances. The dental materials contain (a) 0 to 70 wt. % of at least one polymerizable monomer and/or oligomer; (b) 0.1 to 5 wt. % of at least one polymerization initiator; (c) 0 to 60 wt. % of one or more fillers, (d) at least 20 wt. % of the wax-like polymerizable substance. They can be kneaded at room temperature and can be modelled in non-polymerized state without additional heating, like conventional waxes. On polymerization, the wax component is covalently incorporated into the polymer. The dental materials are suitable for producing temporary and permanent dental prostheses.

Abstract: Polymerizable hybrid monomers with norbornenyl or norbornadienyl groups are described which can be radically cured at room temperature and are suitable in particular for use in the dental field.

Abstract: A hand-held light curing device has a light source and a light guiding device having a light receiving opening. A lens arrangement with a focusing lens is positioned between the light source and the light guiding device. The focusing lens has first and second cut-off filters on proximal and distal surfaces thereof, respectively. The cut-off filters are preferably vapor-deposited on the surfaces. Preferably, the focusing lens has a convex surface facing the light source, and the first filter has reflective properties with respect to infrared light.

Abstract: A method of producing dentures is provided. A moldable denture plate is introduced into the mouth of a patient. Deformation of the denture plate is carried out in a patient-specific manner. While the denture plate is still in the patient's mouth, it is subjected to at least a preliminary hardening. After being removed from the patient's mouth, the denture plate is provided with prefabricated teeth.