Abstract: The invention relates to a device for measuring fluorescent radiation emitted by biological substances, comprising a light source, a capturing unit, an evaluation unit, at least one emission fibre, and at least one detection fibre. Said emission fibre guides excitation radiation to the biological substrate and the detection fibre receives fluorescent radiation and guides it to the evaluation unit. The capturing unit comprises a semiconductor sensor arrangement that detects fluorescent radiation emitted by the biological substance in wave length areas that are separate from each other, are arranged. Data sets of at least two different reference measurements on at least two different biological substances are stored and compared to the measured measurement values to the stored data sets and issues a result relating to the pathological attacks of the examined biological substances and/or relating to the type of examined, biological substances.

Abstract: The invention relates to a device for detecting signs of bacterial infection of teeth, comprising a light source, a receiving unit, an evaluation unit, coupled to the receiving unit, at least one emission fiber, coupled to the light source, and at least one detection fiber, coupled to the receiving unit. The invention is characterized in that both the emission and detection fiber have an acceptance angle of more than 35°.

Abstract: The present invention relates to a medical handset with a nozzle having at least one nozzle line for supplying a medically active medium, such as for example an air-powder mixture and/or a fluid, in particular for the prophylactic treatment of teeth, wherein the handset has a head part with a connecting part on the head for the exchangeable connection of the handset to the nozzle, wherein at least one supply line of the handset is connected to the at least one nozzle line of the nozzle by producing a sealing-tight interference fit of a sealing face on the nozzle with a sealing face on the handle, in particular in that a tongue-and-groove connection is produced between the nozzle and the connecting part, e.g. in that a T-groove on the nozzle is inserted into a T-tongue on the handle, the axis of insertion lying roughly at right angles to the longitudinal axis of the handset.

Abstract: A dental handpiece for use with a device for treatment of teeth by a jet of an abrasive powder mixed with air and water has a first one-way valve in a first supply line for pressurised air connected to an integrated powder container of a gripping sleeve and at least a first filter is further provided in this first supply line at a position upstream of the first one-way valve and downstream of a connecting end where the supply line connects with a common supply for air and water which is provided at the rearward end of the gripping sleeve. A second filter is provided at a position downstream of the first one-way valve in the first supply line and a second one-way valve is provided in a second supply line for water together with a third filter. The first and third filters each have a fine-meshed screen body. The second filter has a microporous sintered metallic body or a microporous plastic body.

Abstract: A powder reservoir for a dental abrasive blasting apparatus is provided with a discharge valve having a closure body that comprises associated driving means for moving a closure body with a pulsed frequency alternately between a closing position and an opening position of an associated discharge opening of the powder reservoir for discharging the powder into a mixing chamber which is passed by a supply line for compressed air for supplying a handpiece with a mixture of compressed air and abrasive powder particles.

Abstract: A foot switch for operation of at least two different functional members of a dental apparatus which is operatively connected with the foot switch has at least two press switches which are each formed as a diaphragm switch comprising a printed circuitry with an arrangement between two carrier foils which as a package are supported on a base plate of the foot switch within a hollow formed by an overlaid cover plate and connected by a signalling line with at least two different functional members of the dental apparatus for transmitting functional control signals upon depression of the cover plate.

Abstract: In a device for detecting transmission losses of optical light guide means (2) of an endoscope (3) by means of measurements, said optical light guide means (2) having an optical inlet portion (4) through which light from a light source (6) is transmitted to an optical outlet portion (8) of the means to be checked, said device comprising at least one light sensor (10) measuring the light intensity emerging from the optical outlet portion (8) of the means (2) to be checked, and an evaluation means (14) for the signal of the at least one light sensor (10), said evaluation means (14) having a display means (18) for displaying the measurement result, it is provided that the at least one light sensor (10) is arranged in a chamber (20), that the optical outlet portion (8) of the light guide means (2) to be checked is adapted to be introduced through an opening (22) of the chamber (20) into the chamber (20), and that the inner surface (24) defining the chamber (20) diffusely reflects the light emerging from the optic

Abstract: A nozzle piece for a handpiece of a dental abrasive blasting apparatus comprises a gripping member for connection with a head portion of the handpiece whereby the gripping member has a closed surface with a thusly defined curvature on its upper and underneath visual surfaces that discharge openings of two discharge nozzles of the nozzle piece are located close to a visual plane which by definition includes a longitudinal axis of the handpiece and outside of which are located the crossing points of two supply ducts with a common central axis of the two discharge nozzles, whereby the two supply ducts extend in parallel and inclined with respect to the longitudinal axis of the handpiece for defining an inclined discharge angle of a working jet of the nozzle piece.

Abstract: A dental apparatus comprises a connector arrangement for allowing a connection of a fluid reservoir containing a fluid which is supplied to a dental handpiece under control of a valve arrangement by a suction pump which has a suction line that is connected with a reception member of a connector piece of the fluid reservoir on which a closure one-way check valve is arranged which is biased by a closure spring towards a closing position on a valve seat of the connector piece which is further provided with an aeration one-way check valve over an aeration opening for compensating a negative pressure which will be produced inside of the fluid reservoir when the closure one-way check valve is opened at its valve member and fluid is drawn from the fluid reservoir for being supplied to the handpiece.

Abstract: A medical instrument for treating biological tissue comprises a housing (2), a pressure wave generation means (4) and a transmission means (8) for coupling the unfocused pressure waves into the body of living beings. The transmission means (8) comprises a pressure chamber (12) having an inlet and an outlet end, the pressure chamber (12) containing a liquid (14) into which pressure waves from the pressure wave generation means (4) can be coupled, which pressure waves can be transmitted to a membrane (16) arranged at the outlet end of the pressure chamber (12) which membrane (16) couples the pressure waves transmitted from the liquid unfocusedly into the biological tissue.

Abstract: A filtration device for separating concrements, fragments or other body material from liquids which are processed by means of a lithotripter connected to a suction device equipped with a peristaltic valve and sucked out of body cavities. The device has a functional zone having an inlet zone connected at one end to the lithotripter, and an outlet zone connected to the suction device. There is a collection zone mounted on the functional zone and connected to the other end of the inlet zone. A filter element is disposed between the functional zone and the collection zone, so that body material processed by the lithotripter will be deposited in the collection zone, and the filter element will separate the body fluids collected by the lithotripter from the body material.

Abstract: A valve arrangement for stopping fluid passage through at least one flexible tubing is provided with a camshaft having at least one control cam which is designed as a sink in an otherwise closed circular surface of the camshaft for moving a press member which is retracted into an inactive relative position when radially aligned with the sink and which is protruded into an active relative position by the circular surface of the camshaft for then squeezing the associated portion of the flexible tube which is passed through a housing of the valve arrangement in a direction normal with respect to a longitudinal bore rotatably supporting the camshaft and also normal with respect to a radial bore which is arranged for radially guiding the press member.

Abstract: A dental handpiece for use with a device for treatment of teeth by means of a jet of an abrasive powder mixed with air and water comprises a first one-way valve means in a first supply line for pressurised air connected to an integrated powder container of a gripping sleeve whereby at least a first filter means is further provided in this first supply line at a position upstream of the first one-way valve means and downstream of a connecting end of the supply line with a common supply means for air and water which is provided at the rearward end of the gripping sleeve. A second filter means is provided at a position downstream of the first one-way valve means in the first supply line and a second one-way valve means is provided in a second supply line for water together with a third filter means. The first and third filter means each comprise a fine-meshed screen body. The second filter means comprises a microporous sintered metallic body or a microporous plastic body.

Abstract: A device for removing calculi by using an intracorporeal lithotripter comprises a single metallic probe or sonotrode which for the fragmentation of calculi is connected with an electrically controlled ultrasonic transducer for generating longitudinal oscillations which alternatively may be switched to the generation of shock or pressure waves by either a pulse wave stimulated oscillation of the metallic probe or sonotrode or by a reversibly driven impact member or projectile which is accommodated by the hollow of a backward tubular extension of the sonotrode.

Abstract: A dental apparatus comprises means for allowing a connection of a fluid reservoir containing a fluid which is supplied to a dental handpiece under control of a valve arrangement by a suction pump which has a suction line that is connected with a reception member of a connector piece of the fluid reservoir on which a closure one-way check valve is arranged which is biased by a closure spring towards a closing position on a valve seat of the connector piece which is further provided with an aeration one-way check valve over an aeration opening for compensating a negative pressure which will be produced inside of the fluid reservoir when the closure one-way check valve is opened at its valve member and fluid is drawn from the fluid reservoir for being supplied to the handpiece.

Abstract: A device for removing calculi by using an intracorporeal lithotripter comprises a single metallic probe or sonotrode which for the fragmentation of calculi is connected with an electrically controlled ultrasonic transducer for generating longitudinal oscillations which alternatively may be switched to the generation of shock or pressure waves by a pulse wave stimulated oscillation of the metallic probe or sonotrode.

Abstract: A filtration device for separating concretions, fragments or other body material from liquids which are processed by means of a catheter connected to a suction device equipped with a peristaltic valve and sucked out of body cavities. The device has a functional zone having an inlet zone connected at one end to the catheter, and an outlet zone connected to the suction device. There is a collection zone mounted on the functional zone and connected to the other end of the inlet zone. A filter element is disposed between the functional zone and the collection zone, so that body material processed by the catheter will be deposited in the collection zone, and the filter element will separate the body fluids collected by the catheter from the body material.

Abstract: For a surgical instrument for removing distal and/or peripheral cement (2) and/or a medullary block in a medullary cavity (8) when endoprostheses are replaced, the surgical instrument comprising a drilling tool (4) and an extraction tool (6), it is provided that the drilling tool (4) and the extraction tool (6) comprise a bore (14,16) extending coaxially to the respective tool shaft (12) for receiving a centering bolt (10), that the bore diameter of the coaxial bores (14,16) of the drilling tool (4) and the extraction tool (6) is substantially adapted to the diameter of the centering bolt (10), and that the centering bolt (10) anchored at a predetermined location in the cement (2) or the medullary block and the medullary space (5) located distally below it is configured as an axial guide for the drilling tool (4) and the extraction tool (6), respectively.