Abstract: An endodontic obturation point for obturating a dental root canal comprising a core material, an outer material and a coupling element for transmitting ultrasonic waves to the obturation point. The core material comprises an ultrasonic non-deformable material and the outer material comprises an ultrasonic deformable material.

Abstract: A dental restoration, a method for the production of a dental restoration and a kit. The dental restoration comprises an outer component, in particular a shell, and an inner component, in particular a core. The inner component and the outer component contain composite material. The outer component is mountable or mounted on the inner component. The inner component is designed for attachment onto a tooth preparation, in particular a tooth stump.

Abstract: A dental instrument comprising a shaft and a working part adjoined thereto, with the working part having a coating in which abrasive bodies are embedded, is proposed, Firstly, the average proportion of the surface of the abrasive bodies which is covered by the coating can be at least 60%, preferably at least 65%, most preferably at least 70%. Secondly, the coating can, moreover, also consist of a nickel ahoy which additionally contains at least one element selected from the group consisting of titanium, vanadium, niobium, chromium, molybdenum, tungsten, manganese, iron and cobalt. In addition, a process for coating a working part, in particular for producing a dental instrument of this type, and also the use of such a dental instrument for cutting machining of solid bodies are proposed.

Abstract: A device for withdrawal of a fluid from a storage container has a body (11) which is configured so that it can be connected to an opening of the storage container, a rimmed cover (12) mounted on the upper end of the body (11), a connector (13) arranged laterally adjacent to the rim of the cover (12) for connecting the device to a syringe, and a suction line (16) which at its lower end leads vertically into the storage container and at its upper end opens into the connector (13).

Abstract: A dental restoration, a method for the production of a dental restoration and a kit. The dental restoration comprises an outer component, in particular a shell, and an inner component, in particular a core. The inner component and the outer component contain composite material. The outer component is mountable or mounted on the inner component. The inner component is designed for attachment onto a tooth preparation, in particular a tooth stump.

Abstract: A dental instrument comprising a shaft and a working part adjoined thereto, with the working part having a coating in which abrasive bodies are embedded, is proposed. Firstly, the average proportion of the surface of the abrasive bodies which is covered by the coating can be at least 60%, preferably at least 65%, most preferably at least 70%. Secondly, the coating can, moreover, also consist of a nickel alloy which additionally contains at least one element selected from the group consisting of titanium, vanadium, niobium, chromium, molybdenum, tungsten, manganese, iron and cobalt. In addition, a process for coating a working part, in particular for producing a dental instrument of this type, and also the use of such a dental instrument for cutting machining of solid bodies are proposed.

Abstract: A system for filling a root canal of a tooth and for covering pulp, with a silicone material comprising MxOy, where MxOy is selected from the group comprising CaO, BaO, MgO, Na2O, K2O, and SrO, especially preferably CaO; and/or at least one compound containing MxOy, where MxOy is selected from the group comprising CaO, BaO, MgO, Na2O, K2O, and SrO, especially preferably a compound containing CaO, in particular a compound containing CaO/SiO2. Such compositions exhibit bioactive properties and improve the ease of use and the prognosis for success of the system, according to the present invention, for filling a root canal and for covering pulp.

Abstract: The invention relates to a method for producing a ceramic crucible. The following steps are proposed: providing a solidifiable slip, providing a casting mould (10) for the ceramic crucible, pouring the slip into the casting mould, solidifying the slip in the casting mould by (a) freezing and/or (b) changing its pH value, such that a preform is obtained, and heat-treating the preform, such that a ceramic crucible is obtained. The invention additionally relates to a ceramic crucible producible using such a method and a kit for producing such a ceramic crucible, having: (a) a casting mould, preferably a metal mould, for a ceramic crucible, (b) a sol, preferably an aqueous SiO2 sol, comprising a ceramic nanoparticle fraction, (c) ceramic particles comprising a microceramic fraction, (d) optionally a metal powder consisting essentially of metals and/or alloys and/or intermetallic compounds, (e) optionally one or more further additives and optionally organic or inorganic binders.

Abstract: Methods are described for the production of a muffle for precision or model casting having the following steps: preparation of a pattern preparation of an investment, comprising a mixture of: a) a dispersing agent, b) a ceramic powder containing (i) a fraction having a diameter of less than 500 nm (nanoceramic powder fraction) in a proportion of 2-74% (V/V), based on the volume of the total mixture, and (ii) a fraction having a diameter of more than 500 nm (microceramic powder fraction) in a proportion of 2-74% (V/V), based on the volume of the total mixture c) optionally a metal powder consisting of metals and/or alloys and/or intermetallic compounds, d) optionally one or more further additives and e) optionally inorganic or organic binder investing or covering the pattern with the investment solidification of the investment investing or covering the pattern by a) freezing, b) gelling, in particular on the basis of a change in pH value and/or c) dehydrating, during and/or after the solidification, drying the

Abstract: A pipe joint with a sleeve element, which has an internal thread, and with a spigot element, which has an external thread which can be screwed to said internal thread. One element has a constant pitch throughout and the other element, with two sections extending in each case from the ends of the threaded length is likewise provided with a constant pitch. The other element has more than two sections with a pitch which is constant within the section but is different from the first-mentioned element, it being the case that the pitch difference at least of one section is in the opposite direction, in terms of sign, to the rest of the sections. The pitch difference of one section is at least double that of the adjacent sections and in the screwed-together position, in the section with the large pitch difference, the thread play and the thread tolerances are compensated and the load flank of one corner tooth of this section, with the guide flank of the other corner tooth, produces the basic bracing.

Abstract: A pipe joint with a sleeve element and with a spigot element configured to be threadedly connected together to collectively absorb the load experienced by the joint over the threaded sections of the sleeve and spigot. By suitably selecting the leads and tooth gaps in the sleeve or spigot, it is possible for the guide flank at one thread end to be braced against the load flank at the other thread end thereby effecting maximum bracing at the edges of the thread and decreasing toward the thread center.