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 root canal treatment information apparatus includes circuitry which stores three-dimensional information including information on a root canal of teeth in a storage, the three-dimensional information being acquired by an X-ray CT image capturing device, specify a tooth as a target of interest, generate a tooth image of the tooth, instruct display of the tooth image on a display, generate, based on the three-dimensional information, a root canal extension direction image showing a root canal extension direction along the root canal of the tooth, and instruct display of the root canal extension direction image on the display as overlapping, and in correspondence with, the tooth image.

Light at wavelengths in the near-infrared (NIR) region in the second NIR spectral window from 1,100 nm to 1,350 nm and a new spectral window from 1,600 nm to 1,870 nm, known as the third NIR optical window, and fourth at 2200 cm1 are disclosed. Optical attenuation from thin tissue slices of normal and malignant breast and prostate tissue, and pig brain were measured in the spectral range from 400 nm to 2,500 nm. Optical images of chicken tissue overlying three black wires were also obtained using the second and third spectral windows. Due to a reduction in scattering and minimal absorption, longer attenuation and clearer images can be seen in the second, third and fourth NIR windows compared to the conventional first NIR window. The second and third spectral windows will have uses in microscope imaging arteries, bones, breast, cells, cracks, teeth, and blood due to less scattering of light.

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.

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 working length measuring endodontic file system (10) comprises an endodontic file (11) having a stopper (22) moveable along a shaft (12), and a distance measurement circuit (24) which automatically determines a distance from the handle (20) to the stopper (22). The endodontic working length is then determined by subtracting this distance and the thickness of the stopper (22) from the length of the shaft (12). The handle-to-stopper distance may be measured using any known approach, such radiated signal rangefinding (e.g., laser, lidar, radar, or ultrasonic); inductive distance sensing; linear magnetic encoding; mechanical linkage coupled to, e.g., rheostat or measuring wheel encoder; resistance measurement; and the like. In one aspect, a camera (25) and image recognition software calculate the handle-to-stopper distance.

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).

A dental apparatus usable for root canal procedures in conjunction with a dental clamp includes a first base member, a second base member spaced apart from the first base member, a first reference member extending between the first and second base members and connecting the first and second base members to one another, the first reference member extending in a first direction relative to an imaginary plane extending across the first and second base members, a second reference member extending between the first and second base members and connecting the first and second base members to one another, the second reference member being spaced apart from the first reference member, a first post extending from the first base member in a second direction relative to the imaginary plane, opposite to the first direction, and a second post extending from the second base member in the second direction.

A dental treatment apparatus according to the present invention includes a drive unit that includes a micromotor, a motor driver, and the like, a controller, and a root canal length measurement circuit. The controller controls the cutting tool to be held at a head forward driven in a direction of cutting of an object to be cut. The controller also controls the cutting tool to be reverse driven in a direction reverse to forward rotation drive when the cutting tool is forward driven and the root canal length measurement circuit detects a tip end of the cutting tool reaching a reference position. The controller further carries out a fail-safe control when the cutting tool is reverse driven and the root canal length measurement circuit detects movement of the tip end of the cutting tool toward a root apex position.

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.