The present invention relates to a hand operated dental instrument that allows a user to manually operate tool bits that are ordinarily operated by a power operated tool. Then invention includes a handle that carries a shaft; a bore-hole extending through at least a portion of the shaft for receiving a tool bit; an elevated stop disposed in the bore-hole for engaging at least a portion of a tool bit that is inserted into the bore-hole; a securing ring receiving slot disposed in the shaft and is in fluid communication with the bore-hole; and a securing ring that when placed in the securing ring receiving slot presses at least a portion of the tool bit towards the elevated stop so that when the shaft is rotated, the tool bit rotates.

The invention relates to a dental treatment instrument for operating a rotational tool. The treatment instrument has a head drive, which is provided for coupling to a shaft of the rotational tool and comprises a sleeve-like guide bushing (1), and a collet (9) for fixing the rotational tool. The guide bushing (1) has surface sections (3) which form parts of a cylindrical shape in at least one first axial region. Recesses (4) are provided which face radially outwards from the surface sections (3) and which impart a shape deviating from a rotationally symmetrical shape to the inner contour of the guide bushing (1). By virtue of the surface sections (3), a circular cylindrical shaft of a rotational tool can be guided or supported in a particularly suitable manner. The recesses (4) are additionally suitable for engaging radial protrusions of a non-circular cylindrical shaft of a rotational tool such that the non-circular cylindrical shaft can be driven in a particularly suitable manner. The treatment instrument according to the invention thus offers the possibility of receiving tool shafts with a correspondingly modified shaft geometry in order to meet particularly high corresponding requirements and counteract the aforementioned disadvantages and weaknesses of a shaft according to DIN EN ISO 1797 and the possibility of additionally using the tools according to DIN EN ISO 1797 for standard applications.

A dental prophylactic treatment device having: a prophylactic contra-angle handpiece having a handle part extending along a longitudinal axis, a head part adjoining the handle part, a tool holder rotatably disposed in the head part and extending along an axis of rotation, wherein the longitudinal axis of the handle part and the axis of rotation of the head part are disposed at an angle to one another, and a dental tool having a tool shaft and a prophylactic treatment section, wherein the tool shaft extends from a handpiece end of the dental tool over a length up to the prophylactic treatment section, wherein at least a section of the tool shaft is detachably received in the tool holder, so that the dental tool together with the tool holder can be rotated about the axis of rotation, and wherein the length of the tool shaft is a maximum of 10.0 mm.

A dental electronic device for universal application with controlled thrust includes an elongated body inside which is positioned a battery supplying an electric motor for driving a thrust pin arranged to cooperate with a connection tip selected from a range of connection tips and being locked inside the elongated body of the pen, each tip including a fastening element for retaining the fastening element inside the elongated body and a recognition element which is activated during the connection of the tip and allowed to initialize one of the control programs previously integrated in an electronic card housed inside the body and connected to a control button placed on an outer face of the elongated body for controlling the electric motor based on the given control program of the tip so as to drive the tip.

The invention relates to a collet chuck for clamping a dental tool, wherein the collet chuck has at least temporarily a mechanical stress applied to it and is made of steel.

The collet chuck according to the invention is characterized in that the steel, at least in a surface layer, has a nitrogen content of at least 0.1 wt %.

A dental prophylactic treatment device having: a prophylactic contra-angle handpiece having a handle part extending along a longitudinal axis, a head part adjoining the handle part, a tool holder rotatably disposed in the head part and extending along an axis of rotation, wherein the longitudinal axis of the handle part and the axis of rotation of the head part are disposed at an angle to one another, and a dental tool having a tool shaft and a prophylactic treatment section, wherein the tool shaft extends from a handpiece end of the dental tool over a length up to the prophylactic treatment section, wherein at least a section of the tool shaft is detachably received in the tool holder, so that the dental tool together with the tool holder can be rotated about the axis of rotation, and wherein the length of the tool shaft is a maximum of 10.0 mm.

A holding apparatus for an in particular dental workpiece includes a holding element and a fixing device. The workpiece can be fixed to the holding apparatus by a relative movement of the fixing device with respect to the holding element. The fixing device or the holding element has a split sleeve, and the inside surface of the split sleeve forms a clamping surface for the workpiece. Upon the relative movement of the fixing device with respect to the holding element, the workpiece can be braced against the holding device by the clamping surface.

A disposable prophy angle is provided, the prophy angle comprising a housing containing a drive shaft and a driven shaft; the drive shaft having a proximal end and a distal end and a longitudinal axis therebetween, the distal end having a substantially conical driving portion and a projection, the proximal end of the drive shaft configured to engage a dental hand piece; and the driven shaft having a driven portion comprising a recess configured for engagement by the projection and/or the substantially conical portion of the drive shaft to oscillate the driven shaft at an oscillation angle greater than 90 degrees. In some embodiments, there is a method of making a disposable prophy angle by overmolding a prophy cup to the prophy angle. In other embodiments, there is a method of using the prophy angle to prevent tooth decay.

A rotating member of a dental clamping apparatus is movably connected to a body and disposed in a through hole. A hole diameter is located on an inner side of a clamping member and is corresponding to an elastic abutting slope. The clamping member is movably connected to the rotating member. A first blocking member disposed in a first blocking hole is engaged with an annular groove so as to rotate the rotating member relative to the body. A second blocking member disposed in a second blocking hole is engaged with an axial track so as to move the clamping member along an axial direction relative to the body. The rotating member is rotated relative to the body to axially move the clamping member. The elastic abutting slope is abutted against an annular slope so as to resiliently deform the clamping member to change the hole diameter.

A surgical grip for receiving a handpiece shaft for conjoint rotation therewith and/or for receiving a medical tool in such a way as to transmit torque, includes a carrier sleeve on which at least one coupling component provided for coupling the handpiece shaft is attached such that the at least one coupling component can be brought to a coupled position and to an uncoupled position in the operating state, wherein the at least one coupling component can be brought into contact with an activation unit which is arranged between the carrier sleeve and an outer actuation sleeve, wherein a rotation securing unit present inside the actuation sleeve acts on the activation unit in a spring-biased manner in the operating state such that the activation unit is held secure against rotation relative to the carrier sleeve.