Abstract: A storage container (1) for a suspension used for medical purposes, in particular for ultrasonically assisted treatment of periodontitis, dental cleaning or dental preparation, comprises a flexible pouch (2), the interior of which is accessible via a charging and discharging nozzle (5). Situated in the interior of the pouch (2) is a distance element (6), in which a groove system (8, 9, 10) is incorporated. The groove system communicates with the interior of the charging and discharging nozzle (5). When the pouch (2) of said storage container (1) is pressed flat during removal of the suspension it contains, the opposing sides (3, 4) of the pouch (3) are applied during the final phase of emptying against the distance element (6). The groove system (8, 9, 10) contained in the latter however remains clear and forms a path, via which even the last residues of the suspension may be reliably removed from the pouch (2).

Abstract: Disclosed is a dental therapeutic device used for infiltrating and/or rinsing tissue or hollow spaces bordered by tissue, particularly tooth tissue or hollow spaces bordered by tooth tissue, with a therapeutic fluid. The inventive device comprises a storage container (2) for the therapeutic fluid, a hollow needle (42) for feeding the therapeutic fluid into the tissue, a pump (15, 43, 47) feeding the therapeutic fluid from the storage container (2) to the hollow needle (42), and a pump (15, 43, 47) sucking therapeutic fluid from the tissue via the hollow needle (42). All of said components are comprised in a hand-piece-type unit, whereby a very compact dental therapeutic device is created which is easy to handle for the dentist and requires no external units or only units that are generally part of a dentist's practice.

Abstract: The invention relates to a diagnostic apparatus with which diseased hard tissue, in particular carious dental tissue, can be examined through a small working channel, to see whether it can be made healthy again by remineralization. This diagnosis apparatus tightly (54) seals the working channel, produced in the tissue, from its environment, and places the cavity in the tissue under pressure, after which the pressurization is ended and a pressure drop is measured by means of a pressure measuring instrument (60). The speed of the drop in pressure is a measure of the extent of the changes to the diseased tissue. The invention also relates to a treatment device for supporting the remineralization or reinfiltration of diseased hard tissue and for preparing this, as well as to diagnosis and treatment agents and treatment substances.

Abstract: A dispersion of pyrogenically produced cerium oxide, which does not contain any particles larger than 1 ?m, is produced by dispersing a pyrogenically produced cerium oxide in water by means of a dissolver, centrifuging it, separating the supernatant from the bottom product, and again dispersing the supernatant by means of ultrasound. The dispersion can be used for chemical-mechanical polishing (CMP).

Abstract: A light application unit for a combined photodynamic diagnosis and photodynamic therapy of non-malignant diseases of a parodontium and a tooth of a living being having administered a pharmaceutical preparation allowing the photodynamic diagnosis and the photodynamic therapy comprises a light source, a focusing unit for focusing light emitted by the light source, at least one element arrangeable in a light beam path of the light, and at least one wave guide for transmitting the light from the light source to a distal emitting end, the wave guide is configured rigidly in at least a distal handling end section thereof and being curved in a distal end section.

Abstract: A material for modifying the optical properties of cells comprises a basic material and a modification substance distributed in the basic material at a prescribed concentration, wherein the basic material comprises a viscous fluid, a gel, a two-dimensional or three-dimensional porous substrate or a material which hardens in situ.

Abstract: A material for modifying the optical properties of cells comprises a basic material and a modification substance distributed in the basic material at a prescribed concentration, wherein the basic material comprises a viscous fluid, a gel, a two-dimensional or three-dimensional porous substrate or a material which hardens in situ.

Abstract: A material for modifying the optical properties of cells comprises a basic material and a modification substance distributed in the basic material at a prescribed concentration, wherein the basic material comprises a viscous fluid, a gel, a two-dimensional or three-dimensional porous substrate or a material which hardens in situ.

Abstract: A material for modifying the optical properties of cells comprises a basic material and a modification substance distributed in the basic material at a prescribed concentration, wherein the basic material comprises a viscous fluid, a gel, a two-dimensional or three-dimensional porous substrate or a material which hardens in situ.

Abstract: A process of manufacturing of a chromatography material comprising the steps of (i) reacting a polymerizable at least bifunctional monomer A with a ligand also having a functional group which binds covalently with one of the functional groups of said polymerizable bifunctional monomer A, (ii) to form a compound B comprising at least one polymerizable functional moiety (iii) polymerizing the compound B essentially alone or with the polymerizable monomers in presence of porogenes to obtain a block of porous polymerizate which is self-supporting or (iv) reacting the ligand and a spacer via a covalent bond which is cleavable to form a ligand-spacer conjugate and binding the ligand-spacer conjugate to the surface of a chromatographic support or reacting the ligand-spacer conjugate via a covalent bond to the at least bi-functional monomer A and polymerizing it essentially alone or with the polymerizable monomers in presence of porogenes to obtain a block of porous polymerizate which is self-supporting.

Abstract: An impression material for the use with an impression spoon in patients, wherein the impression material comprises curable components and at least one first filler, characterized in that said at least first filler has a BET surface of from 20 to 50 m2/g, preferably from 30 to 40 m2/g, whereby the impression material attains a low thixotropy and a viscosity of from 1 to 350 Pas.

Abstract: A process of manufacturing of a chromatography material comprising the steps of

Abstract: A suspension for the ultrasonic preparation of natural hard tissue contains between 5 and 45 wt. % of hard particles, between 2 and 40 wt. % of at least one polyhydric alcohol and between 0.1 and 10 wt. % of dispersants and thickeners The suspension having this composition is capable of being stored and shipped without the risk of the hard particles settling. It constitutes a pumpable concentrate which, during the actual ultrasonic preparation, is diluted with an appropriate amount of water to give the ready-to-use suspension.

Abstract: A device for generating high-frequency mechanical vibrations for dental purposes comprises a current detector (50) fitted in the supply line of a vibration generator (12). The output signal of the current detector (50) is transmitted to one of the inputs of a control circuit (74), which at its other input receives a supply current nominal value signal. The output of the control circuit (74) is connected to the control terminal of a controllable oscillator (42), which together with a power stage (46 to 48) prepares the supply current for the vibration generator (12). In this manner, a constant output amplitude of the vibration generator is obtained independent of the load coupled to said vibration generator at any given time.

Abstract: A light application unit for a combined photodynamic diagnosis and photodynamic therapy of non-malignant diseases of a parodontium and a tooth of a living being having administered a pharmaceutical preparation allowing said photodynamic diagnosis and said photodynamic therapy comprises a light source, a focusing unit for focusing light emitted by said light source, at least one element arrangeable in a light beam path of said light, and at least one wave guide for transmitting said light from said light source to a distal emitting end, said wave guide is configured rigidly in at least a distal handling end section thereof and being curved in a distal end section.

Abstract: A tray for producing impressions of dental arches includes a peripheral edge wall that forms a sealing point with soft tissue in the patient's mouth. The interior of the tray is connected via a plurality of vacuum connection pieces to a suction arrangement. Disposed in an impression space provided by the tray is an impression material distributor tube that conveys impression material, preferably to the rear impression space. The distributor tube is connected to an impression material source.

Abstract: The present application refers to a process for preparing 6,10- and 6,9-dimethyl-5,10-undecadienyl-2-ones by telomerizing isoprene with alkyl acetoacetates in the presence of a catalyst system containing a transition metal compound catalyst and a phosphorus- or arsenic-containing compound cocatalyst, wherein the process is performed in the presence of a protic additive of the general formula in which: R1, R2, R3 represent an alkyl group with 1 to 9 carbon atoms, branched or unbranched, a cycloalkyl group with 6 to 8 carbon atoms, an aryl group, in particular phenyl, or an arylalkyl group, X(−) represents an inorganic or organic anion, y is 1 or 2, and the &bgr;-ketoester so obtained is saponified and decarboxylated in a manner known per se.

Abstract: A light application unit for a combined photodynamic diagnosis and photodynamic therapy of non-malignant diseases of a parodontium and a tooth of a living being having administered a pharmaceutical preparation allowing said photodynamic diagnosis and said photodynamic therapy comprises a light source, a focusing unit for focusing light emitted by said light source, at least one element arrangeable in a light beam path of said light, and at least one wave guide for transmitting said light from said light source to a distal emitting end, said wave guide is configured rigidly in at least a distal handling end section thereof and being curved in a distal end section.

Abstract: A dental instrument for sonic or ultrasonic treatment comprises a shank (1) to which a treatment section (2) is joined. The shank (1) and treatment section.(2) are made of matrix-bonded carbon fibers. The instrument can be machined out of a woven carbon fiber fabric or can be a compression molding or an injection molding. The mechanical properties of the instrument can be adjusted by varying the length of the carbon fibers.

Abstract: A process for the preparation of 3,5,5-trimethylcyclohexa-3-en-1-one (&bgr;-isophorone) by isomerization of 3,5,5-trimethylcyclohexa-2-en-1-one (&agr;-isophorone) in the liquid phase in the presence of a salt-like or organometallic catalyst. By using catalytic quantities of alkali-metal salts or alkaline-earth salts and/or their organometallic compounds, and without addition of a further auxiliary substance, the space-time yield in the preparation of &bgr;-isophorone is high. &bgr;-Isophorone is particularly suitable as an intermediate product for the preparation of ketoisophorone.