A dental machining system for manufacturing a dental restoration including: a dental tool machine (1) which has: a dental blank holder for holding at least one dental blank (2) relatively movably with respect to one or more dental tools (3); one or more driving units (4) each for movably holding at least one dental tool (3) for machining the dental blank (2), a control unit for controlling the dental blank holder and the driving units (4) based at least on a temporal trajectory of the dental tool (3) relative to the dental blank (2) and a spatial amount of material removal from the dental blank (2) along the temporal trajectory. The control unit executes a trained artificial intelligence algorithm.

A dental machining system for manufacturing a dental restoration including: a dental tool machine (1) which has: a dental blank holder for holding at least one dental blank (2) relatively movably with respect to one or more dental tools (3); one or more driving units (4) each for movably holding at least one dental tool (3) for machining the dental blank (2), a control unit for controlling the dental blank holder and the driving units (4) based at least on a temporal trajectory of the dental tool (3) relative to the dental blank (2) and a spatial amount of material removal from the dental blank (2) along the temporal trajectory. The control unit executes a trained artificial intelligence algorithm.

Provided is a dental handpiece capable of rotating a cutting tool at a high speed as compared with a conventional dental handpiece. A dental handpiece including coupling portion, a body, and a neck to be held by a used and a head connected to them, wherein the head includes a tool rotating mechanism that holds a cutting tool for treating a region to be treated, rotates based on rotation of a drive unit that is rotationally driven, and rotates the cutting tool, and the tool rotating mechanism has a rotation speed of at least 5.5 times or more a rotation speed of the drive unit.

The present invention relates to a rotary micromotor (10) designed for actuating an abrasive blade (4) of a surgical or dental tool, the motor comprising a rotor (11) co-operating with a stator (12), and being characterized in that the rotor (11) has a hollow central tubular portion, and comprises an outwardly polarized Halbach array.

Disclosed is a new method, and a system, for increasing the pH of a composition applied on teeth and/or gums. The composition is gelable under the influence of a pH change. The pH change typically is a pH increase in the event of a direct pH-triggered gelation. The pH change typically is a pH decrease in the event of gelation induced by ions, such as calcium ions, released from a pH-sensitive carrier. The device comprises a dispensing unit for the composition, a distal end of which is adapted to apply said substance onto teeth or gums. The device further comprises an electrode system comprising first and second electrodes, the first electrode being adapted to be held against the composition at a location at or near teeth or gums, and the second electrode being adapted to be held against the composition at a location away from teeth or gums, The electrode system is adapted so as to provide an electrical potential difference of 1.5 to 10 Volt between the electrodes.

A multi-directional handpiece that includes a motor drive extending along and configured for rotation about a body axis, the motor drive having: a motor gearing at a proximal end of the motor drive; and a file gearing in engagement with the motor gearing for transferring the rotational and axial movement to a workpiece; and a housing for the workpiece; and wherein through rotation of the motor drive, the workpiece moves in an axial oscillating motion while being rotated.

A multi-directional handpiece that includes a motor drive extending along and configured for rotation about a body axis, the motor drive having: a motor gearing at a proximal end of the motor drive; and a file gearing in engagement with the motor gearing for transferring the rotational and axial movement to a workpiece; and a housing for the workpiece; and wherein through rotation of the motor drive, the workpiece moves in an axial oscillating motion while being rotated.

An endodontic handpiece including a handpiece body defining a neck portion extending to a head portion which defines a chamber with an opening therefrom. A chalk is positioned in the chamber and includes a cylindrical body having a longitudinal axis, a retainer for holding an endodontic tool co-axially with the cylindrical body, and a pin receiving bore defined in the cylindrical body transverse to the longitudinal axis. A shaft is rotatably supported within the neck portion and having a pin extending from an end thereof and received in the pin receiving bore of the chalk. The pin is offset from a central axis of the shaft such that rotation of the shaft causes the chalk to move downwardly, rotate in a clockwise direction, move upwardly and rotate in a counter-clockwise direction over each 360° rotation of the shaft.

An endodontic handpiece including a handpiece body defining a neck portion extending to a head portion which defines a chamber with an opening therefrom. A chalk is positioned in the chamber and includes a cylindrical body having a longitudinal axis, a retainer for holding an endodontic tool co-axially with the cylindrical body, and a pin receiving bore defined in the cylindrical body transverse to the longitudinal axis. A shaft is rotatably supported within the neck portion and having a pin extending from an end thereof and received in the pin receiving bore of the chalk. The pin is offset from a central axis of the shaft such that rotation of the shaft causes the chalk to move downwardly, rotate in a clockwise direction, move upwardly and rotate in a counter-clockwise direction over each 360° rotation of the shaft.

The invention relates to a dental preparation instrument that includes a tool that rotates in an alternately reversible manner. The preparation instrument has a drive for the tool. The drive provides a continuous fully rotational motion, and a gearing is arranged before the tool. Said gearing converts the continuous fully rotational motion of the drive into an alternately reversing rotational motion, which is continuous as viewed over several reversals.