A root canal treatment device relates to the technical field of dental treatment instruments. The root canal treatment device comprises a contra-angle hand-piece (10) and a root canal file (20) detachably connected to the contra-angle hand-piece (10), and further comprises a drive module (30) in transmission connection with the root canal file (20), the drive module (30) comprises a rotation driver (31) and a vibration generator (32), wherein the rotation driver (31) is configured to drive the root canal file (20) to rotate axially, so as to mechanically cut and ream the root canal, thus shaping the root canal, and the vibration generator (32) is configured to drive the root canal file (20) to vibrate radially. Vibration of the root canal file (20) at a specific frequency can sufficiently activate the activity of the drug material filled in the root canal, especially in the process of filling the drug material into the root canal, the vibration provided by the vibration generator (32) and the rotation of the root canal file (20) that are carried out simultaneously can efficiently discharge the air bubbles in the drug material filled in the root canal, so that the drug material can be tightly filled into the root canal, thereby providing a better environment for subsequent root canal treatment, improving the effect of root canal treatment, and relieving the patients' pain.

A root canal treatment device relates to the technical field of dental treatment instruments. The root canal treatment device comprises a contra-angle hand-piece (10) and a root canal file (20) detachably connected to the contra-angle hand-piece (10), and further comprises a drive module (30) in transmission connection with the root canal file (20), the drive module (30) comprises a rotation driver (31) and a vibration generator (32), wherein the rotation driver (31) is configured to drive the root canal file (20) to rotate axially, so as to mechanically cut and ream the root canal, thus shaping the root canal, and the vibration generator (32) is configured to drive the root canal file (20) to vibrate radially. Vibration of the root canal file (20) at a specific frequency can sufficiently activate the activity of the drug material filled in the root canal, especially in the process of filling the drug material into the root canal, the vibration provided by the vibration generator (32) and the rotation of the root canal file (20) that are carried out simultaneously can efficiently discharge the air bubbles in the drug material filled in the root canal, so that the drug material can be tightly filled into the root canal, thereby providing a better environment for subsequent root canal treatment, improving the effect of root canal treatment, and relieving the patients' pain.

An apparatus for tooth stain removal is presented. The invention comprises a powered device with a chisel tip at its distal end, a body at its proximal end and an electric motor housed within the body for driving the chisel tip. The chisel tip has a proximal end removably coupled to the body and an exposed distal end along a generally longitudinal axis. The chisel tip comprises a pointed end on a first side for cleaning area between teeth and a broad cleaning surface on a second side for cleaning the main surface of each tooth. The chisel tip operates in a reciprocating motion driven by the electric motor. The reciprocating motion repeatedly moves the chisel tip in a back and forth direction by a finite displacement along the chisel tip's longitudinal axis.

An apparatus for tooth stain removal is presented. The invention comprises a powered device with a chisel tip at its distal end, a body at its proximal end and an electric motor housed within the body for driving the chisel tip. The chisel tip has a proximal end removably coupled to the body and an exposed distal end along a generally longitudinal axis. The chisel tip comprises a pointed end on a first side for cleaning area between teeth and a broad cleaning surface on a second side for cleaning the main surface of each tooth. The chisel tip operates in a reciprocating motion driven by the electric motor. The reciprocating motion repeatedly moves the chisel tip in a back and forth direction by a finite displacement along the chisel tip's longitudinal axis.

In a method for controlling a device for the extraction in particular of a tooth root, the device has a front mouth-side support, a tensioning element guided in the latter, and a tensioning mechanism connectable to the tensioning element. The tensioning element is deflected, at the front, approximately at right angles to the longitudinal extent of the support and is connected to a pin fastenable in the tooth root. The tensioning element is drawn to its stretched state by a controllable motor with low expenditure of force or is connected in this stretched state to the pin. The tensile force is then increased manually or automatically to a predefined fixed or variable value by increasing output of the motor of the tensioning mechanism, and thereafter, when the tooth root has come loose, the motor output is reduced to a defined value or to zero.

In a method for controlling a device for the extraction in particular of a tooth root, the device has a front mouth-side support, a tensioning element guided in the latter, and a tensioning mechanism connectable to the tensioning element. The tensioning element is deflected, at the front, approximately at right angles to the longitudinal extent of the support and is connected to a pin fastenable in the tooth root. The tensioning element is drawn to its stretched state by a controllable motor with low expenditure of force or is connected in this stretched state to the pin. The tensile force is then increased manually or automatically to a predefined fixed or variable value by increasing output of the motor of the tensioning mechanism, and thereafter, when the tooth root has come loose, the motor output is reduced to a defined value or to zero.

A root canal therapy device with a mechanical vibration mode and a rotation drive mode includes a head, a handle, a first flexible drive shaft and a second flexible drive shaft. The head includes an outer main part, a mandrel part for mounting a root canal file, a first drive input shaft part and a second drive input shaft part. The mandrel part is mounted in the outer main part. A first drive motor and a second drive motor are disposed on the handle. The invention has the following beneficial effects: the root canal file can rotate and vibrate during root canal preparation, so that the wall of a root canal is efficiently cut by the file; and the file can also vibrate, so that cutting resistance and cutting temperature are effectively reduced, a smear layer is avoided, and the quality and efficiency of root canal preparation are improved.

A method and a device for controlling an electric motor (9), in particular for moving an endodontic instrument. The device has a first sensor (8) and a control unit (2). The control unit (2) has a drive unit (4), a second sensor (6) and a processing unit (3). The processing unit (3) is configured to cause the endodontic instrument (7) to perform a sequence of movements (M1, M2). The sequence of movements (M1, M2) includes a continuous forward movement (M1) and at least one alternating movement (M2). The sequence may include an additional alternating movement (M3) and/or a reverse movement (M4). The number and order of movements to be performed in a sequence depends on a set of predefined threshold values reflecting the torque load applied to the instrument, as measured by one of the sensors.

A method and a device for controlling an electric motor (9), in particular for moving an endodontic instrument. The device has a first sensor (8) and a control unit (2). The control unit (2) has a drive unit (4), a second sensor (6) and a processing unit (3). The processing unit (3) is configured to cause the endodontic instrument (7) to perform a sequence of movements (M1, M2). The sequence of movements (M1, M2) includes a continuous forward movement (M1) and at least one alternating movement (M2). The sequence may include an additional alternating movement (M3) and/or a reverse movement (M4). The number and order of movements to be performed in a sequence depends on a set of predefined threshold values reflecting the torque load applied to the instrument, as measured by one of the sensors.

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.