Dentsply Sirona Inc.

Sirona Dental Systems Gmbh

Matthias Rein

Ralf Sutter

Siegfried Goisser

Metin Ertugrul

Thomas Bierbaum

Hermann Landgraf

Bernd Oehme

Thomas Jerger

Jan-Paul Schermuly

Alexander Muhlbeyer

Joachim Peuckert

Christian Kulhanek

Steffen Müller

Jan Paul Gerlach

Michael Höfle

Thomas Römer

Alexander MÜHLBEYER

A dental hand piece or angle piece including a rotating tool, which is driven via a rotating drive element disposed in a housing, wherein the rotating drive element is mounted in the housing by a radial rolling bearing, wherein the rolling bearing comprises an axial abutment surface and the housing comprises an axial countersurface, and wherein the rolling bearing is axially preloaded with respect to the housing by a spring elementand has a coefficient of friction for the static friction of the abutment surface to the countersurface or the abutment surface and the countersurface to the spring element that is at least 0.16 in the lubricated state and at least 0.25 in the unlubricated state.

Dental hand piece or angle piece with a rotating tool

The invention relates to an adapter for connecting a dental instrument to be operated with compressed gas to a compressor supplying the compressed gas, and to a control unit as well as a treatment unit comprising the adapter, wherein the adapter has at least one first input for the compressed gas of a compressor, a second input for a control signal, an output for connecting to the dental instrument, and a valve between the first input and output that is controllable by the control signal.

Adapter for connecting a compressed gas operated dental instrument to a compressor

A dental handpiece () having a drive () of a tool (), which drive is located in a head housing (), has at least one media-conducting line arranged in the head housing, which media-conducting line has an outlet opening to the tool, and a tool receptacle () arranged in a drive chamber, which tool receptacle is rotatably supported by means of a rolling bearing () in a support () of the head housing () on a side of the drive chamber facing the tool. The rolling bearing has an outer race (), which is supported against the head housing () radially in the support () in the area of a raceway () and which has a sub-area (), the outside diameter Dof which is reduced compared to the outside diameter Din the area of the raceway (). The head housing has a housing projection (), which extends into the area of the reduced outside diameter D, and the media-conducting line () runs at least partially through said housing projection ().

Dental handpiece having a rolling bearing

A dental apparatus that includes a turbine, a rotor, and a disruptive contour. The turbine drives a tool by compressed air. The rotor is arranged in a turbine compartment and rotates about its longitudinal axis. The rotor includes a plurality of blades that extend up to a front side of the rotor. The disruptive contour is at least one protrusion on a wall opposite the front side of the rotor which extends over a height in a direction of the longitudinal axis of the rotor.

Dentists' preparation instrument

A dentists' preparation instrument () comprises a turbine () for driving a tool () using compressed air, and a rotor () that is arranged in a turbine compartment (), rotates about a longitudinal axis (), and has blades () extending to a face () of the rotor (). The turbine compartment () has a discharge port () for the compressed air towards a returning air duct (). Said discharge port () is disposed in such a way that both the face () of the rotor () and parts of the blades () sweep past the discharge port () as the rotor rotates about the longitudinal axis (). For deceleration purposes, the rotor () has a deceleration contour () on the face (), said deceleration contour being formed by projections (), and the turbine compartment () has a deceleration contour chamber () inside which the deceleration contour () is accommodated. The discharge port () in part also extends across the deceleration contour chamber ().

The invention relates to a laser handpiece, an exchangeable fiber-optic insert, and a control unittherefor. The laser handpiececomprises a optical waveguide, which is connected to a light coupling site in a base memberand in which the application elementfor laser light is exchangeably attached to the base member. The base memberis mounted in a sleeve-type gripfor axial displacement therein. The light guidecan be wound around a control devicewhich has an annular gapfor this purpose and a lower housing partwhich is offset from an upper housing part. An exchangeable fiber-optic insertacting as an application element is provided with a sleeveserving as protection during transportation and as an assembling tool.

Laser handpiece, exchangeable fiber-optic insert and control unit therefor

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Lorsch, Germany

Matthias Rein