A dental valve device is disclosed having a valve body having a tip receiving end, a hose receiving end, a lumen formed between the tip receiving end and the hose receiving end, a partial opening formed in the valve body, and a rotatable valve sealing body adapted to being inserted into the partial opening, the rotatable valve sealing body having a bottom having an opening, a bore for alignment with the lumen formed between the tip receiving end and the hose receiving end, the bore having a tip receiving opening and a hose receiving opening, the rotatable valve sealing body having a check valve positioned in the bore and the opening in the bottom.

Methods for controlling and/or regulating of a compressed-gas-operable medical or dental drive device and a control and/or regulating device for performing such methods are described. In one method according to a first embodiment, a rotor of the drive device is operated at an essentially constant rotational speed (n.sub.1) by adjusting the gas pressure and/or the flow rate of the compressed gas through a valve and the rotational speed is reduced on reaching a pressure value (p.sub.2) of the compressed gas which is lower than the maximum gas pressure (p.sub.max) of the compressed gas. In the case of a method according to a second embodiment, the gas pressure of the compressed gas and the rotational speed of the rotor are altered on reaching a rotational speed limit value (n.sub.2, n.sub.3) of the rotor by adjusting the valve.

A root canal treatment robot and a treatment method using the same. In the robot, a pan tilt, and a working optical fiber are driven by an x-axis movement unit and a y-axis movement unit to move on the x-y plane, and the working optical fiber is further driven by a z-axis movement unit to move along the z-axis, and driven by an a-axis movement unit to rotate around the z-axis.

A disposable dental valve device is disclosed having a valve body having an interior, a tip receiving end having a tapered interior for receiving a tip, a hose receiving end, a lumen formed between the tip receiving end and the hose receiving end, and a partial opening formed in the valve body and a rotatable valve sealing body adapted to being inserted into the partial opening, the rotatable valve sealing body having a bore for alignment with the lumen formed between the tip receiving end and the hose receiving end, the rotatable valve sealing body having a top and a handle portion connected to the top.

A disposable dental valve device is disclosed having a valve body having a tip receiving end, a hose receiving end, a lumen formed between the tip receiving end and the hose receiving end, a partial opening formed in the valve body, and a rotatable valve sealing body adapted to being inserted into the partial opening, the rotatable valve sealing body having a bore for alignment with the lumen formed between the tip receiving end and the hose receiving end, the bore having a tip receiving opening and a hose receiving opening, the rotatable valve sealing body having a check valve positioned on the tip receiving opening, and the rotatable valve sealing body having a top and a handle portion connected to the top.

A dental valve device is disclosed having a valve body having a tip receiving end, a hose receiving end, a lumen formed between the tip receiving end and the hose receiving end, a partial opening formed in the valve body, and a rotatable valve sealing body adapted to being inserted into the partial opening, the rotatable valve sealing body having a bottom having an opening, a bore for alignment with the lumen formed between the tip receiving end and the hose receiving end, the bore having a tip receiving opening and a hose receiving opening, the rotatable valve sealing body having a check valve positioned in the bore and the opening in the bottom.

A coupling device for releasable connection of a medical or dental handpiece to a drive unit or to a supply tubing for transferring signals, data and/or energy, a drive movement, a working medium and/or light between the handpiece and the drive unit or the supply tubing, having a first coupling element and a second coupling element, wherein one of the two coupling elements is designed as a coupling cavity, into which a coupling protrusion on the other coupling element can be inserted, a positioning element, which is disposed on the first coupling element or the second coupling element and can be inserted into a first recess on the other coupling element in order to position the two coupling elements in a defined angular position about their common axis relative to one another, at least one light source, which is disposed in a second recess on the first or second coupling element and can be coupled to an optical fiber on the other coupling element as well as by at least one transfer element, which is disposed on the first or second coupling element and can be inserted into a third recess on the other coupling element to transfer data, signals and/or energy between the first and second coupling elements.

The invention relates to a surgical bone-drilling device (1) comprising a drill (3) connected to a drive (2), a container (4) for a coolant (5), at least one pump (6) for delivering the coolant (5), a first conduit (7) for delivering the coolant (5) from the container (4) into the interior of the drill (3), and a second conduit (8) for delivering the coolant (5) from the container (4) to the outside of the drill (3), and also a handpiece (19), a drill guide (20), and a cooling method for such a bone-drilling device (1). To improve the cooling action, a measuring device (9) is provided for detecting the drilling depth (d) of the drill (3), which measuring device (9) is connected to a control device (10) for controlling transport of the coolant (5), such that the quality of the coolant (5) in the first conduit (7) and in the second conduit (8) can be controlled as a function of the drilling depth (d) of the drill (3).

A tailpiece for a dental valve device is disclosed which has a body having a valve receiving end, a hose receiving end, and an intermediate elbow portion between the valve receiving end and the hose receiving end. A tailpiece for a dental valve device is also disclosed which has a body having a valve receiving end, a hose receiving end, an intermediate elbow portion between the valve receiving end and the hose receiving end, a lumen formed in the body between the valve receiving end and the hose receiving end, and a check valve positioned in the lumen.

A medical laser light source system including an excitation laser light source apparatus that generates first excitation light having a wavelength greater than or equal to 1.5 m and less than or equal to 2.2 m and second excitation light having a wavelength greater than or equal to 1.5 m and less than or equal to 2.2 m and differing from the first excitation light with respect to at least one of oscillation energy intensity, oscillation pulse width, repeating frequency, and peak power; an optical fiber that is long-distance and propagates the first excitation light and the second excitation light generated by the excitation laser light source apparatus; and a laser device that generates laser light having a wavelength of at least 2.7 m and no greater than 3.2 m, using at least one of the first excitation light and the second excitation light emitted from the optical fiber.