A gutta percha point and an apparatus for measuring the length of a root canal in a root canal procedure. The gutta percha point includes a head, a neck, a body, and a tail. The neck has a coating of conductive material to which one electrode of the apparatus can be electrically clamped. The tip also includes a layer of conductive material. One or more conductive paths are formed integral to the body extending between the neck and the tail. The gutta percha cone can be used to measure the length of the root canal as well as for filling the tooth cavity.

A device for disinfecting and/or sterilization of a dental cavity includes: an electrode pair that extends into the cavity to provide current along a portion of the cavity; and a controller that sends controlled electrical energy to the cavity via current flowing between the electrodes when located in the cavity, thereby to provide electrical energy for disinfection and/or sterilization.

A device for disinfecting and/or sterilization of a dental cavity includes: an electrode pair that extends into the cavity to provide current along a portion of the cavity; and a controller that sends controlled electrical energy to the cavity via current flowing between the electrodes when located in the cavity, thereby to provide electrical energy for disinfection and/or sterilization.

A root canal treatment apparatus includes a root canal treatment hand piece having a visible light camera which captures a visible light image of a tooth as a target of interest, and circuitry which detects a position of the root canal treating hand piece, and instructs display of three images corresponding to at least a tip position of a cutting tool attached to the root canal treating hand piece, an X-ray cross-sectional image of the tooth captured by X-ray CT image capturing beforehand, and the visible light image captured by the visible light camera such that the three images are displayed on a display in an overlapping manner in positional correspondence with one another, based on information on the position of the root canal treating hand piece detected by the circuitry.

A method comprising: comparing each value of measured signals with a plurality of model tooth position measurement data groups, and storing the measured signal values and an indication value at the time when a fluctuation of the indication value which indicates a distance from a root apex position to a distal end of an electrode for position detection shows an apex in a convex shape, the indication value being indicated by a model tooth position measurement data group in a predetermined relationship; and comparing second-time measured signal values and an indication value with the stored first-time measured signal values and the stored indication value, respectively, if at least two of them correspond or fall within a predetermined error range, stopping the electrode and measuring a position of the distal end of the electrode.

The disclosure relates to a dental treatment system for locating the apex of a tooth of a patient, including: a lip clip having a first electrode attachable to the lip of the patient; a motorized handheld dental device having a housing which includes: a rotating hub; a second electrode connected to the rotating hub; and an illuminating means which is adapted to emit visible light and mounted into the housing; an electrical measurement unit which is connectable to both the lip clip and the motorized handheld dental device, and adapted to locate the apex of the tooth based on a measurement of the electrical impedance between the first electrode and the second electrode, and an optical output unit adapted to output a signal indicative of the located apex. The signal changes the illumination state of illuminating means in accordance with the distance of the endodontic file to the apex.

A gutta percha point and an apparatus for measuring the length of a root canal in a root canal procedure. The gutta percha point includes a head, a neck, a body, and a tail. The neck has a coating of conductive material to which one electrode of the apparatus can be electrically clamped. The tip also includes a layer of conductive material. One or more conductive paths are formed integral to the body extending between the neck and the tail. The gutta percha cone can be used to measure the length of the root canal as well as for filling the tooth cavity.

The present invention relates to an endodontic file clip (1) for an apex locator, comprising: a hollow body (2); a push button (3) movably linked to the body (2); a spring (4) pushing the push button (3) away from the body (2); an electrically conductive hook (5) movably arranged within the body (2) and partly protruding out of the tip (2a) of the body (2) and fixed to the push button (3) to securely attach an endodontic file (6) to the tip (2a) when the push button (3) is released towards the closed position, and disengage from the endodontic file (6) when the push button (3) is pressed towards the open position; characterized by further comprising: a detachment mechanism (7) for re-attachably detaching the push button (3), the spring (4) and the hook (5) from the body (2) for cleaning and disinfection in a dental washer disinfector, wherein the detachment mechanism (7) comprises a detachment slot (2c; 2c) in the body (2) which extends up to the tip (2a) and joins said hole, to allow manual detachment of the push button (3), the spring (4) and the hook (5) from the body (2) when the hook (5) is manually moved from said hole into the detachment slot (2c, 2c).

An apex locator attachment for connection to an apex locator for measurement of the position of the length of a root canal during endodontic treatment. A shape, structure and dimensions of the attachment are configured to maximize the ease of use of the attachment and to enable mechanical and electrical coupling of a dental instrument to an apex locator while allowing the apex locator attachment to be easily cleaned, disinfected and autoclaved.

A dental treatment apparatus includes a holder, a power supply, root canal length measurement circuitry, and control circuitry. The holder holds an electrode placed in a root canal. The power supply energizes file with a high-frequency current. The root canal length measurement circuitry electrically measures a position of a distal end of electrode in the root canal. The control circuitry causes, in accordance with information on the position of the distal end of the electrode measured by root canal length measurement circuitry, the power supply to control a current value of the high-frequency current which energizes the electrode.