Abstract: A medical or dental handpiece which has an outer sleeve, a tool-holding sleeve for holding a treatment tool, wherein the tool-holding sleeve has a central axis about which the tool-holding sleeve can be rotated and wherein the tool-holding sleeve can be induced to a stroke motion by a driveshaft of the handpiece, and an adjusting device, which is designed to secure the tool-holding sleeve selectively in a rotational position or to allow a free rotatability of the tool-holding sleeve, wherein the adjusting device has a fixation element, which secures or releases the tool-holding sleeve and at least one adjusting element, which is at least operatively connected to the fixation element, wherein the adjusting element is movable substantially in parallel with the central axis of the tool-holding sleeve.

Abstract: Medical handpieces for dispensing filling material are disclosed. Some handpieces comprise a connection device for a filling material container, a vibration unit for the generation and transmission of vibrations to the filling material and a conveying device for conveying filling material from the container. The vibration unit comprises a vibration exciter and a sonotrode, wherein the sonotrode and the connection device are movable relatively to each other for conveying filling material from the filling material container. In addition handpieces are described for dispensing filling material, the vibration unit of which is operable in an automated operating mode for pulsed power output on the filling material.

Abstract: Embodiments of a medical hand-grip element for injection of a substance from an ampoule, comprise a drive device for driving the ampoule and the injection needle, a delivery device for delivering the medicinal substance out of the ampoule and a coupling device for rotationally fixed coupling of the ampoule with the injection needle and for preventing a relative movement between the ampoule and the injection needle is disclosed. Embodiments of injection systems, injection units, injection needles and handling methods for them are also disclosed in which the risk of injury and contamination for the user is reduced by providing approaches for covering the ends of the cannulas of the injection needles during a number of handling steps.

Abstract: Medical treatment devices, such as dental treatment devices, include at least a drive unit for driving a tool configured to act on a treatment site, a light-emitting device and a cooling media dispensing device for dispensing at least one cooling medium onto a tool and/or a treatment site. The device can be controlled, such as with a controller, to substantially alternatingly operate the light-emitting device and the dispensing device, thereby intermittently illuminating the tool and/or the treatment site and dispensing cooling medium toward the tool and/or the treatment site, respectively, which provides a user with an improved view of the tool, the treatment site, or both.

Abstract: A device for quickly stopping a medical or dental drilling tool comprising a drilling tool having a body extending between a connection end and a working end and having a longitudinal extension along a longitudinal axis of the drilling tool the drilling tool has a hollow outer shell in which a probe is held that can be moved along the longitudinal axis so that a part of the probe can be moved out of the shell through an opening. The probe is designed as an elongated pin, and its first end facing the connection end is held in the interior of the hollow outer shell. An electromagnetic sensor for detecting relative movement between the shell and the probe is arranged along the longitudinal extension of the body. The drilling tool has a channel for a treatment fluid extending along the longitudinal axis.

Abstract: There is disclosed a medical or dental hand-piece element comprising a coupling mechanism for a detachable connection of the hand-piece element to a drive unit, a tool receptacle that is or can be connected to the hand-piece element, and a drive element for transmitting a driving movement from the drive unit to the tool receptacle so that the tool receptacle can be set into a working movement, wherein the drive element comprises at least one rotatable shaft, and a generator for converting mechanical energy into electric energy, wherein the generator can be driven by the at least one rotatable shaft of the drive element.

Abstract: A fluid-operated medical or dental handle with a device for limiting the rotational speed to a maximum rotational speed value is disclosed. The handle comprises a rotating part that can be induced to rotation by a driving fluid for driving a tool connectable to the rotating part, an electrodynamic transducer driven by the rotating part for induction of an electric voltage, wherein the electrodynamic transducer has at least one coil and a magnetic element and at least one switch element for optional opening and closing of a circuit between the two ends of the at least one coil, so that with the circuit closed, an electric current and an induced magnetic field that decelerates the rotational speed of the rotating part and the tool connectable thereto can be induced in the coil of the electrodynamic transducer.

Abstract: An intraosseous injection device includes a tool having a distal portion, a proximal portion, and a solution dispensing opening. The distal portion has one or more cutting surfaces. The tool can be coupled with a protective carrier. The tool can be rotatably coupled to a tool actuation mechanism. A housing has a distal end and a proximal end. The housing releasably receives a solution cartridge containing a solution. A solution dispensing mechanism dispenses solution from the solution cartridge. A gripping member grips a proximal portion of the tool. A rotation device rotates the gripping member and thereby rotates the tool about an axis. The proximal portion of the tool connects directly to the solution cartridge such that solution from the cartridge can be delivered through the solution dispensing opening. The tool is configured to rotate relative to the solution cartridge.

Abstract: Described herein is a medical or dental handpiece head having a head sleeve detachably connected by a screw or threaded connection to a closing cap, and a locking device for locking the closing cap with the head sleeve. The locking device between the closing cap and the head sleeve is formed by at least one spring element. The locking device is designed and arranged so that unintentional release of the screw connection between the closing cap and the head sleeve caused by vibrations during operation of the handpiece can be suppressed.

Abstract: A fluid-operated medical or dental handheld element is disclosed, having a connecting device for connecting the handheld element to a fluid source so that a first impeller can be induced to rotate by a fluid stream to cause a tool to execute a driving motion, a fluid conducting device arranged between the connecting device and the first impeller for conveying a fluid stream away from or toward the first impeller, and a generator for generating electric power. The generator includes a second rotatable impeller that can be driven by at least a substream of the fluid stream conveyable in the first fluid conducting device. One result is more constant generation and output of power by the generator independent of the rotational speed of the first impeller, thereby insuring a more constant power supply to a power consuming device connected to the generator.

Abstract: A dental handpiece for root canal treatment comprises an outer sleeve, a connecting device for connecting the handpiece to a control and analyzing unit, a measurement circuit having a power source and to a drive unit, an electrically conducting tool receptacle and an electrically conducting driving device, wherein the tool receptacle and the driving device are mechanically and electrically connected together so that a driving motion generated by the drive unit can be transmitted via the driving device to the tool receptacle and electrical measurement signals can be transmitted between the driving device and the tool receptacle. A first connection is provided for transmitting the driving motion. A second electrically conducting connection, which may comprise sliding contacts, is provided for transmitting the electrical measurement signals.

Abstract: Described are a handpiece, a coupling, and a device with a laser source and handpiece for emitting a laser beam for dental treatment. In order to avoid damage to the healthy tooth tissue, an improved determination of the tooth temperature by measurement of at least part of the heat radiation emitted from the treatment area using a temperature sensor, preferably an infra-red sensor, is carried out. Upon reaching or exceeding a temperature threshold, the emission of the laser beam to the treatment area is interrupted or the power output of the laser source reduced or the user made aware of the violation of the threshold value using an acoustic or visual signal. The temperature sensor can be located, e.g., on the handpiece or on the coupling, such as on the coupling tube.

Abstract: In a second preferred variant of the second exemplary embodiment, the magnetic sensor detects the presence of a magnetic field of the magnetic element as long as no battery is connected to the charger. The battery comprises a shielding device which deflects or shields the magnetic field from the magnetic sensor, so that after connecting the battery to the charger, the magnetic sensor detects that no magnetic field is present and emits an identification signal. This variant is advantageous, in particular in stepped contact devices, whereby one of the two elements is a sensor or magnet at the bottom of the step and the other of the two elements is arranged on the leg at an angle thereto. This makes it possible to achieve a particularly good shielding effect. In this variant, several magnetic elements and magnetic sensors may also be provided.

Abstract: A medical or cosmetic hand-held laser device with an optical waveguide device is subdivided into a first section and a second section arranged at an angle thereto for emitting laser radiation onto a treatment area. To deflect the laser beam from the first section into the second section as effectively as possible and in particular to launch the laser beam with the lowest possible loss into a waveguide that conducts the laser beam further, the hand-held device is provided with a reflector that is arranged between the two sections and has an essentially elliptical reflective surface.

Abstract: A connecting device of a cleaning or care apparatus or a cleaning cassette comprises a blocking device which is movable between a first position and a second position and prevents loosening or displacement of an instrument that is to be cleaned during a cleaning or care operation because of the pressure exerted by the cleaning or care media. In some embodiments, a direct or indirect operative connection between the blocking device and a component of the cleaning or care apparatus or between the blocking device and at least a part of the cassette is provided, which transmits to the blocking device the force required to move the blocking device from the first position into the second position. In other embodiments, the blocking device is moved from the first position into the second position by the action of the media in the line, e.g., either by direct contact with the media or indirectly through contact with another intermediate element.

Abstract: A handpiece for measuring root canal length having an outer sleeve that is substantially non-insulating, a connecting device, an instrument carrier, at least one transmission element within the outer sleeve, a length measuring circuit portion, a contact portion and an insulating portion. The instrument carrier is configured to receive a dental instrument. The transmission element transmits force to move the instrument carrier so that a dental instrument received in the instrument carrier executes a rotating, reciprocating and/or vibrating working movement. The length measuring circuit portion is disposed inside the handpiece and operable to transmit measuring signals for measuring length. The contact portion is operable to establish a conductive path between the dental instrument serving as an electrode and the length measuring circuit portion.

Abstract: A medical handle device having an illumination apparatus with at least one optical semiconductor component and a method for manufacturing such a hand-held device are displayed. It is proposed that in order to adapt the hand-held device to the specific requirements of a medical application such as uniformly high light emission, high mechanical resistance, sterilizability and electric safety, the illumination apparatus is provided with a base body, at least one blind hole arranged in the base body, a light-emitting window which is formed by the part of the base body extending from the bottom of the blind hole to the first end of the base body and is connected to a cover device which is connected to the base body and with which the blind hole forms a hermetically sealed interior, whereby the at least one optical semiconductor component is arranged in the hermetically sealed interior and the base body and the cover device are made of an electrically non-conducting material that can withstand sterilization.

Abstract: An intraosseous injection device includes a tool having a distal portion, a proximal portion, and a solution dispensing opening. The distal portion has one or more cutting surfaces. The tool can be coupled with a protective carrier. The tool can be rotatably coupled to a tool actuation mechanism. A housing has a distal end and a proximal end. The housing releasably receives a solution cartridge containing a solution. A solution dispensing mechanism dispenses solution from the solution cartridge. A gripping member grips a proximal portion of the tool. A rotation device rotates the gripping member and thereby rotates the tool about an axis. The proximal portion of the tool connects directly to the solution cartridge such that solution from the cartridge can be delivered through the solution dispensing opening. The tool is configured to rotate relative to the solution cartridge.

Abstract: The invention concerns a handpiece for a surgical or dental tool (3), which can be inserted in the head of the handpiece (1) through an insertion hole (14) into a tool holder (2) and is rotationally supported by means of two axially separated bearings (12, 13), with positive torque transmission (8) to the tool (3) by the drive (9) installed in the handpiece, such that the tool possibly has a longitudinal bore (6) for supplying cooling liquid to the work site, and the handpiece (1) possibly has a short, fixed feed tube (7), which extends into the longitudinal bore and is sealed from the tool (3). To increase the torque that can be transmitted, the invention is characterized by the fact that the torque transmission (8) occurs in the region of the bearing (13) that is adjacent to the insertion hole (14). The invention also concerns the development of suitable tools.