Abstract: In a handpiece (2) having a housing (3), a drive sleeve (7) mounted therein, into which drive sleeve a tool (9) can be inserted with its shaft (11) and which drive sleeve is mounted in the housing to be rotatable around its middle axis (9a) by a drive, a releasable coupling for rotational locking connection of the shaft (11) in the drive sleeve (7), and a releasable coupling for axial connection of the shaft (11) with the drive sleeve (7), whereby each coupling is formed by a coupling recess (18) in the shaft (7) and a coupling pin (19) on the drive sleeve (7) engaging in the coupling recess, the two couplings are formed by at least one common coupling recess (18) and the common coupling pin (19) is mounted to be moveable between a coupling position engaging in the coupling recess (18) and a decoupling position releasing the coupling recess (18) and is biased into its coupling position and against the shaft (11) by the force of a spring (34).

Abstract: A pump for conveying flowable paste-like materials, including a conveyer line which has a plurality of conveyer elements sequentially arranged in the longitudinal direction of the conveyer line to selectively displace and release at least a part of the volume of material conveyed by the conveyer line. The pump possesses a working chamber consisting of an annular chamber externally bounded by a housing of the pump and interiorly by a cylinder. The conveyer elements incorporate bellows elements each in the form of a ring of an elastically extensible material acted upon by a pressure medium at a side opposite the material being conveyed, with the bellows elements being formed by a common hose-like bellows which is retained on an inner wall of the housing. A support ring is located between respectively each of the bellows elements for retaining the bellows on the inner wall, with pressure lines located between the support rings and passing through the housing to open into the annular chamber.

Abstract: A process for the cleaning and/or disinfection and maintenance care of an, in particular, hollow or tubular medical treatment instrument, in particular a medical or dental treatment instrument, such as a handpiece, in which the treatment instrument is cleaned and/or disinfected with a preferably liquid cleaning and/or disinfecting agent and is then subjected to maintenance care with a maintenance care agent, is characterized in that, there is used a cleaning agent and/or a disinfecting agent and/or a maintenance care agent, one or more of which agents contains or contain a medium which ensures mixing of the cleaning and/or disinfecting agent with the maintenance care agent.

Abstract: In a process for cleaning and/or disinfecting and/or maintaining medical or dental instruments, in a washing container filled with liquid, particularly water, the at least one tool holder being washed internally and externally and additionally having ultrasound applied thereto, in the case of a hollow or sleeve-shaped instrument, particularly tool holder, the cavity of the instrument, in particular the cavity or cavities of the tool holder accommodating the mechanical drive elements, is drained and ultrasound is then applied to the tool holder.

Abstract: In a training and practice apparatus (1) for simulating and practising clinical dental processes, with a model bust (6) which has a chest part, a neck (16) and a head (7) and is swivel-mounted on a carrier (4), the head (7) is mounted on a head carrier by means of a joint (17) and can thereby be swivelled into different working positions and fixed in the adopted swivel position, the joint (17) is arranged in the neck (16), the neck (16) has an engagement recess (28) opening approximately coaxially at its bottom end and the head carrier is a bearing rod, engaging in the engagement recess, on which the joint (17) is arranged and which is mounted in the chest part.

Abstract: A dental laser treatment unit, especially for medical or dental purposes having a control unit and a supply device, connected with the control unit by a releasable connection, for a laser treatment instrument.

Abstract: In a handpiece head for a medical or dental handpiece having an in particular angular housing, in which a treatment tool is mounted so that it can move back and forth along it centre axis and rotate, wherein a rotating position adjustment device for the treatment tool is associated with the handpiece head, and has a positioning coupling with two interacting coupling parts,a rotating engagement member for the treatment tool that is manually externally accessible is movably mounted on or in the housing,the rotatable engagement member and/or the positioning coupling are/is connected to the treatment tool by a displacement coupling that enables stroke movement of the treatment tool, andthe positioning coupling is effective between the housing and the rotatable engagement member or the treatment tool.

Abstract: In a training and practice apparatus (1) for simulating and practicing clinical dental processes and for carrying out technical dental work, with a liquid extraction device (17) and a solids extraction device (14), a common vacuum source (25) is provided for both extraction devices (14, 17), with a suction line section (26) which branches at a branch (27) with two suction line branches (28, 29) to the extraction devices (14, 17), a change-over device (37) being arranged in the area of the branch (27) to open the one suction line branch and simultaneously close the other suction line branch (28, 29).

Abstract: In a machining device for machining precision, in particular dental, workpieces in a machining chamber surrounded by a housing, having an inspection window with two gripping holes arranged to the two sides of the inspection window, the machining chamber is preferably connected or connectable to a suction device and arranged in the machining chamber is at least one blasting nozzle for blasting and/or a demolding tool for demolding and/or an air nozzle for blowing off the workpiece.

Abstract: In a device for selectively cleaning, disinfecting and maintaining medical or dental instruments, particularly tool holders, with a washing container to accommodate at least one instrument and with an ultrasonic cleaning device with an ultrasonic exciter which is arranged on the washing container, the washing container has a cross-sectional shape, preferably a horizontal cross-sectional shape, which deviates from a rectangular or square cross-sectional shape.

Abstract: Machining device for machining precision, in particular dental, workpieces in a machining chamber surrounded by a housing.In a machining device for machining precision, in particular dental, workpieces in a machining chamber surrounded by a housing, having an inspection window with two gripping holes arranged to the two sides of the inspection window, a mounting for a glove or sleeve being arranged in the edge regions of each hole, the mounting has two coaxial clamping rings insertable one into the other, of which the one clamping ring is affixed to the housing in the region of the associated hole edge.

Abstract: In a process for cleaning and/or disinfecting and/or maintaining medical or dental instruments, in a washing container filled with liquid, particularly water, the at least one tool holder being washed internally and externally and additionally having ultrasound applied thereto, in the case of a hollow or sleeve-shaped instrument, particularly tool holder, the cavity of the instrument, in particular the cavity or cavities of the tool holder accommodating the mechanical drive elements, is drained and ultrasound is then applied to the tool holder.

Abstract: In a medical or dental instrument having a driven treatment tool and an illumination device with a lamp, in particular for the treatment area, wherein the lamp is mounted in a plug-in socket, the plug-in socket is formed by two spring elements biassed towards one another between which the lamp is mounted to swing freely. Alternatively at least one damping element can be arranged between the holder and the lamp or the holder can be mounted elastically on the base part.

Abstract: In a medical treatment device for a treatment station, consisting of a motor-operated treatment instrument having a hand piece consisting of at least two portions, of which the one hand piece portion can be connected to a control unit by means of a media supply line and the other hand piece portion is used to receive a treatment tool, one of the two hand piece portions contains a separable motor cartridge and associated with the treatment location there is a receiving arrangement for the motor cartridge, to which arrangement the motor cartridge can be transferred using the hand piece portion which supports the cartridge and from which the motor cartridge can be transferred back again using the hand piece portion which supports the cartridge.

Abstract: A medical treatment device, in particular for surgical purposes, consisting of a treatment instrument in the form of a handpiece which is connected to a control unit through a supply line. Operatively associated therewith, and preferably with the control unit, is a media source which supplies cooling fluid and to which the supply line is connected with a flexible line extending either thereon or within. Associated therewith is a rinsing device possessing a rinsing agent source and a collecting container, which device can be selectively connected to the flexible line. Also disclosed is a method for cleaning the flexible line.

Abstract: In a dental articulator having articulator arms which in their working position extend forwards, of which one is mounted in swivel/sliding joints to pivot about a swivel axis extending at right angles to the vertical longitudinal centre plane, and provided on the sides of the articulator arms facing one another are placement areas for a lower tooth model or upper jaw tooth model, and the tooth models can be fixed detachably by centering devices to the respective associated articulator arms, two different upper parts are associated with the articulator which can as desired be mounted accurately to and dismounted from the common lower part, and the centering devices are arranged on the respective associated upper part so that they are in an accurately fitting relationship to the centering device of the lower part in the mounted position of the associated upper part.

Abstract: In a dental articulator having articulator arms which extend forwards in their working position, of which one is mounted in two swivel/sliding joints to pivot about a swivel axis extending at right angles to the vertical longitudinal centre plane, said joints being arranged on both sides of the vertical longitudinal centre plane as mirror-images and being each formed by an articular recess in an articular housing and a spherical head that engages through an opening in the articular recess, and the articular recess has a sagittal guide surface, a Bennett guide surface and a lateral guide surface, and associated with each swivel/sliding joint is a locking device with a locking element for locking the associated swivel/sliding joint in its 0-position (final biting position), and the locking element can be adjusted between a locking position and a releasing position allowing sliding movements in the associated swivel/sliding joint, a form-locking connection is provided between the locking element and the spherica

Abstract: A medical treatment device, in particular for surgical purposes, having at least one treatment instrument in the form of a hand piece which can be connected to a control unit by means of a flexible supply line, there being associated with the treatment device, preferably with the control unit, a source of treatment agent, in particular for cooling fluid, to which it is possible to connect a treatment agent line, which extends at least in part through the supply line to the front end of the hand piece, in the form of a hose, the treatment agent line having a hose section which extends with radial play for movement in the supply line as far as the hand piece and is there connected to a plug-in spigot which is plugged in a releasable manner in an axial plug-in socket in the hand piece and has an axial and a radial channel section, of which the axial channel section issues from the hose connection and the radial channel section is connected to the continuing treatment agent line.

Abstract: A device for detecting dental caries has an illumination device which emits radiation of a pre-determined wavelength towards a tooth. A filter accepts radiation returned by the tooth in a pre-determined spectral range. The accepted radiation is evaluated for caries detection. The illumination device has at least one light guide, by means of which the radiation can be supplied to the tooth. The illumination device emits radiation in the spectral range from 360 to 580 nm. The filter accepts the returned radiation in the spectral range above 620 nm. The device can be used in a flexible manner and enables a low level of caries to be identified.

Abstract: An improved device for machining workpieces in a chamber surrounded by a housing. The housing has a hollow space defined by housing walls. A blasting nozzle is positioned in the chamber and is connected by a line to a supply of blasting medium in a container. The chamber is separated by partition walls from the hollow space of the housing. A carrying structure in the hollow space carries the container through a loading opening defined by the housing walls. The loading opening can be closed by a wall. The carrying structure for the blasting medium container is movable between a working position in the housing through the loading opening into a loading position where a filling opening in the medium container is outside the housing.