Abstract: A support plate assembly (10) for teeth which includes a plate-like body (12) with external dimensions that may be strung together, and a substantially flat, quadrilateral wax receiving portion (22) for the acceptance of an adhesive wax or the equivalent into which a plurality of teeth may be pressed, one next to the other. The wax receiving portion (22) is delimited by convex, forward-thrusting arched upper and lower ridges (14, 16), and lateral ridges. A flat strip of wax is held in the wax receiving portion such that the wax receiving portion has a greater depth at the center area intended for premolar than at the lateral areas intended for molars.

Abstract: X-ray opaque esters or amides of iodosubstituted benzoic acid according to formula I and polymers and dental materials produced therefrom. ##STR1## R.sup.1 =hydrogen or C.sub.1 to C.sub.3 alkyl, preferably H or CH.sub.3 ; R.sup.2 =straight-chain or branched C.sub.1 to C.sub.6 alkylene, oxyalkylene or arylene, preferably C.sub.2 to C.sub.4 alkylene and particularly preferably --CH.sub.2 --CH.sub.2 -- and --CH.sub.2 CH(--)CH.sub.2 --;X=O or NH, preferably O;R.sup.3 -R.sup.7 =at least 3 iodine substituents, preferably in R.sup.3, R.sup.4 and R.sup.6 or R.sup.3, R.sup.5 and R.sup.7 position, the other groups are hydrogen, C.sub.1 to C.sub.6 alkyl, C.sub.1 to C.sub.6 alkoxy, --Cl, --Br, --OH, --NH.sub.2, --N(C.sub.1 to C.sub.6 alkyl).sub.2 or --NH--CO--(C.sub.1 to C.sub.6 alkyl), preferably R.sup.3, R.sup.4, and R.sup.6 are=I and R.sup.5 and R.sup.7 =H, or R.sup.3, R.sup.5 and R.sup.7 =I and R.sup.4 and R.sup.6 =--NH(COCH.sub.3);n=1, 2 or 3, preferably 1 or 2.

Abstract: In the case of a denture made of pre-fabricated teeth, that exhibits molars and pre-molars for each jaw, upper and lower, at least on the upper molars at the lingual position, an incising ridge (24) is provided. The incising ridge is intended, in the occlusion position, to engage the masticatory surface (18) of the antagonist of the lower jaw (14) in each case. The masticatory surface (18) exhibits a sulcus (45) with at least some areas of convex arcuate projection (20, 22) by means of which the antagonist (14) may be centered in tripodized incuspidation on the incising ridge (24).

Abstract: The invention relates to a multi-component dental cement which contains as a first component an ethylenically unsaturated polymerisable compound, as a second component calcium hydroxide, calcium oxide or a precursor thereof and also a polymerisation initiator, the constituents of which can be contained in one or more cement components, which is characterized in that the ethylenically unsaturated polymerisable compound has both at least one .beta.-dicarbonyl group and also at least one acrylic, alkacrylic or vinyl aromatic group. Also included are a process for the production of a multi-component dental cement and the use of the described polymerisable .beta.-dicarbonyl compounds in calcium hydroxide dental cements.

Abstract: The present invention relates to novel bicycloaliphatic 2-methylene-1,3-dioxepanes, which are suitable as starting materials for the preparation of polymers and copolymers, preferably of composite and dental materials. The 2-methylene-1,3-dioxepanes according to the invention, which can undergo radical polymerisation with ring opening with only very little volume shrinkage, can be prepared in a simple manner, are easy to purify and to modify chemically, and are characterised by lack of odour and advantageous physical properties.

Abstract: A leucite-containing phosphosilicate glass-ceramic is described which, in addition to a leucite crystalline phase and at least one further crystalline phase, also contains one or more glass phases.

Abstract: A ZrO.sub.2 -containing glass ceramic is described, the main crystalline phase of which is formed by ZrO.sub.2 and which has at least one further crystalline phase, and which can be used in particular in dentistry.

Abstract: The invention relates to dental materials which contain a photochromic material such as for example a photochromic dye, a photochromic glass, a photochromic ceramic and/or a photochromic glass ceramic and which can be visually distinguished from natural tooth material after irradiating with light, but which assume their original colour again after a certain period has expired.

Abstract: A color key (10) useful as an aid for the selection of the color of artificial teeth. The color key receives a plurality of color sticks (14), each stick having a colored area at one end which corresponds in color to an artificial tooth. The color key includes a plurality of individual insertion pockets (12), each of which pockets has a stick receiving unit (22) which may receive an individual color stick, and which insertion pockets (12) may be attached to one another individually substantially laterally to the extent of the stick receiving unit (22). By using this construction the color key can be quite individually adapted to the needs of the practice of the dentist or dental technician.

Abstract: Alkali-zinc-silicate glass ceramics and glasses are described which have a linear thermal expansion coefficient in the range from 8.0 to 18.7.times.10.sup.-6 K.sup.-1, an excellent chemical resistance and other advantageous optical properties and can be used in particular as dental material.

Abstract: The use of a thermally curable composition as dental material or constituent of a dental material is described, which composition contains one or more .beta.-dicarbonyl compounds and one or more .alpha.,.beta.-unsaturated carboxylic acid esters, the curing of the composition taking place in the presence of a catalyst base.

Abstract: The invention relates to a dental cement, a process for its preparation and its use. The cement contains a polymerisable mono or polyfunctional carbonyl compound which corresponds to one of the following general formulae: ##STR1## in which R.sup.1 may be an alkyl, cycloalkyl, alkoxy or aryl group or a combination thereof,R.sup.2 may be an alkyl, cycloalkyl, alkoxy or aryl group, a combination thereof or hydrogen,R.sup.3 may be an alkyl, cycloalkyl, alkoxy or aryl group, a combination thereof or hydrogen, andX is either not present or may be O, NR, NH or S, where R may be an alkyl, cycloalkyl, alkoxy or aryl group or a combination thereof, andat least one of the groups R.sup.1, R.sup.2 or R.sup.3 is also substituted by a group Y containing at least one polymerisable vinyl group, except for compounds containing naphthyl groups substituted with carboxylic acid anhydride functions.

Abstract: A rechargeable light curing apparatus having at least one hand-operated device with a handle and an on/off switch and a recharging unit to which said hand operated device can be mechanically and electrically coupled. The hand-operated device has a battery pack with at least one accumulator and an electrical contact for recharging the battery pack. A lamp is connected to the battery pack and emits light at a defined light emission state when switched on by the on/off switch. Light conducting elements are positioned in the vicinity of the lamp for receiving and conducting the emitted light. A capacity measuring circuit is connected between the battery pack and the lamp for determining a remaining operating period of the battery pack before a recharging of the battery pack is required.

Abstract: An opalescent glass is described which is characterized by a continuous glass phase and a discontinuous glass phase dispersed therein, and which can be used as dental material or as a constituent of dental materials.

Abstract: A dental material which is curable in a first stage to an elastic phase in which the material can be worked mechanically or surpluses removed, and in a second stage to its final form, comprising:(a) at least one polyfunctional epimine (aziridine);(b) at least one ethylenically unsaturated monomer;(c) at least one catalyst for the hot, cold, or light polymerization of the ethylenically unsaturated monomer; and(d) at least one catalyst to accelerate the polymerization of epimine (a), but which does not however influence the polymerization of (b).

Abstract: A capsule for dental compositions has a mixing chamber for mixing a dental composition that contains a first component of the dental composition and has a bottom with an outlet opening for the dental composition. A piston is positioned in an initial position at an upper end of the mixing chamber. The piston has at least one recess and an inner chamber containing a second component of the dental composition. The inner chamber has a bottom in the form of a temporary seal. A plunger is positioned in an initial position at an upper end of the inner chamber of the piston. Upon depressing the plunger, the temporary seal is broken to introduce the second component into the mixing chamber. A manually removable U-shaped locking member has two legs and a connecting bar connecting the legs wherein the connecting bar is elongate in a direction pointing away from the legs to form a grip portion.

Abstract: A chlorhexidine adduct is described, which comprises one molecule of chlorhexidine with three molecules of hydrogen fluoride and one molecule of hydrogen tin trifluoride. The adduct displays a high antibacterial effectiveness against Streptococcus mutans even in very low concentrations.

Abstract: A chlorohexidine adduct comprising one molecule of chlorohexidine with six molecules of hydrogen fluoride and a process for its preparation are described, said adduct displaying a high anti-bacterial effectiveness vis-a-vis Streptococcus mutans even in very small concentrations and being valuable as anti-plaque agent and for caries prevention.

Abstract: A dental material for the control of caries and paradentitis is described, which contains an active agent combination of thymol and/or carvacrol and chlorhexidine and/or the physiologically compatible salts thereof.The dental material can be a dental varnish or a material such as a dental cement and the like, which remains in the oral cavity for a long period and from which the active combination can diffuse out.

Abstract: In a method for the optical distinction of a dental material applied to a substrate from natural teeth, false teeth or parts thereof 0.00001 to 1% by wt. of a fluorescent substance having an absorption maximum in the wave length range of 360 to 480 nm and a fluorescence maximum in the wave length range of 480 to 600 nm is incorporated in the dental material, the dental material is applied to the substrate and irradiated with a light source emitting light of a wave length in the region of 360 to 480 nm and is then viewed through a light filter filtering out at least partially the light of a wave length in the region of 360 to 480 nm.