Abstract: The present disclosure relates to the technical field of medical appliances, and provides a dental handpiece and a head thereof, and a root canal preparation machine. The head of the dental handpiece comprises a head housing; a movement cavity is provided in the head housing; a rotatable movement and a driving gear are provided in the movement cavity; the driving gear is sleeved on one end of the movement, and the movement can move along the axial direction of the driving gear; a reciprocating driving mechanism is further provided in the movement cavity, and the reciprocating driving mechanism is used for driving the movement to perform reciprocating movement along its own axis.

Abstract: The present invention is a dental composition comprising a cement component and at least one selected from the group consisting of titanium oxide, pure titanium, sodium titanate, and strontium titanate.

Abstract: 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.

Abstract: The present invention provides a broken piece-removing device (300) for removing a broken piece of a treatment instrument left in the root canal of a tooth. Specifically, a device for removing a broken piece (300) according to the present invention includes a handle to be held (312), a tensile guide plate (314) protruding at the distal end of the handle (312), and a wire (316) for fastening the broken piece at the distal end of the guide plate (314), the wire (316) having its proximal end located inside the handle (312) and extending to the distal end of the guide plate (314) along the guide plate (314) and forming a loop at the distal end of the guide plate (314), the handle (312) having a controlling portion for constricting a loop (318) formed at the distal end of the guide plate (314) through the wire (316).

Abstract: This invention provides a method for cutting off dentine of a root canal including the steps of, inserting a guide wire for guiding the cutting element into the root canal, and cutting off the dentine of the root canal with the cutting element.

Abstract: This invention provides a device for removing a broken piece left in the root canal of a tooth comprising a handle to be held by the operator, a portion for fastening the broken piece, and a trigger component for operating the fastening portion.