The invention relates to a method and an arrangement for the cleaning of a circumferentially closed canal by means of a light guide conducting a laser beam, wherein the entry of the laser beam into the light guide is interrupted when the free end of the light guide is outside of the canal and/or the movement of the light guide within the canal is monitored and if there is no movement or the movement is below a first threshold value then a signal is triggered and/or the laser radiation is turned off or its output is reduced, and wherein the turning off of the laser radiation or its reducing is controlled in dependency of at least one signal change and/or a second threshold and/or a signal change relative to the second threshold determined during at least one course of time starting before and including the entry of the light guide into the canal.

The present disclosure provides a device having a circuit. The circuit includes at least one boost converter receiving power from an energy source, a square wave driver in series with the boost converter, an inductor in series with the square wave driver for converting a square wave to a sinusoidal wave, and a piezoelectric transducer in series with the inductor, the piezoelectric transducer connectable to a load. The device further includes a phase-locked loop coupled to the circuit to determine a resonance frequency of the piezoelectric transducer when the piezoelectric transducer is connected to the load.

Embodiments of this disclosure provide a staging assembly (10) for negative pressure, multi-canal irrigation of a root canal system followed by obturation. The staging assembly may be part of a kit that includes a plurality of catheters (50) sized for insertion into the root canal system. To hold the catheter in its proper position in the canal, the catheter may include a stop (37) and the staging assembly may include a corresponding stop hold (36). The distal end (51) of the catheter can be positioned 2 mm to 5 mm from the terminus end of the root canal. The staging assembly is then sealed, creating a closed system. Irrigating solution is vacuum-drawn out the ends of the catheters and debris is evacuated through a vacuum port of the stating assembly. During irrigation, no hands on time is required by the clinician. After irrigation, vacuum is reversed to dry the canal. Obturation occurs through the vacuum portion.

Embodiments of this disclosure provide a staging assembly (10) for negative pressure, multi-canal irrigation of a root canal system followed by obturation. The staging assembly may be part of a kit that includes a plurality of catheters (50) sized for insertion into the root canal system. To hold the catheter in its proper position in the canal, the catheter may include a stop (37) and the staging assembly may include a corresponding stop hold (36). The distal end (51) of the catheter can be positioned 2 mm to 5 mm from the terminus end of the root canal. The staging assembly is then sealed, creating a closed system. Irrigating solution is vacuum-drawn out the ends of the catheters and debris is evacuated through a vacuum port of the stating assembly. During irrigation, no hands on time is required by the clinician. After irrigation, vacuum is reversed to dry the canal. Obturation occurs through the vacuum portion.

An oral irrigator may include a body, a reservoir connected to the body, a tip connected to the body, a motor positioned within the body and including a drive shaft, a pinion gear connected to the drive shaft, a driven gear engaged with the pinion gear, a pump body positioned within the body and defining a pump chamber for receiving fluid from the reservoir, a piston positioned within the pump body, wherein the piston slidably engages an interior surface of the pump body to form a fluid-tight seal, and a connecting rod including a first end connected to the piston, a second end eccentrically connected to the driven gear, and a shaft extending from the first end to the second end. The shaft includes a first rib and a second rib spaced apart from the first rib along a length of the shaft.

An automatic filling mechanism for use in conjunction with a hand-held fluid droplet appliance (10) for dental cleaning, the automatic filling mechanism having a door (42) to a chamber (40) in the hand held fluid droplet appliance (10) for holding fluid, the door having a female liquid inlet port (44) and a female liquid and air exit interface (46) having a snorkel system (80) attached thereto that is inserted into the chamber (40) that is used to fill the chamber (40) with fluid (112) from a reservoir (110) on a docking and charging station (100) when the hand held fluid droplet appliance (10) is inserted into a cradle (160) on the docking and charging station (100).

An oral cleaning system for communicating a status of a handheld oral cleaning device (10) to a docking station (100). The handheld oral cleaning device includes a controller (70) configured to generate a unique charging cycle for each of a plurality of different charging states. The docking station (100) is configured to receive the handheld oral cleaning device, and includes a secondary charging induction coil configured to detect the unique charging cycle for each of the plurality of different charging periods. The docking station further includes a visual indicator (120) configured to indicate, based on the detected charging cycle, one of the plurality of different charging states of the handheld oral cleaning device.

A water flosser having a processor controlled self-supporting coil driving a pump piston such that the flow rate, pressure, output wave form, pulse frequency, pulse duration and/or kinetic energy per pulse of the oral irrigator may be controlled by a user. A user's control input may be transmitted to the processor via a hydraulically transmitted signal from the water flosser handle or from a signal transmitted from a mobile device or by an audible command received by an audio input in communication with the processor or from manual inputs on the water flosser housing. Flow may be independently controlled at the handle.

A water flosser having a processor controlled self-supporting coil driving a pump piston such that the flow rate, pressure, output wave form, pulse frequency, pulse duration and/or kinetic energy per pulse of the oral irrigator may be controlled by a user. A user's control input may be transmitted to the processor via a hydraulically transmitted signal from the water flosser handle or from a signal transmitted from a mobile device or by an audible command received by an audio input in communication with the processor or from manual inputs on the water flosser housing. Flow may be independently controlled at the handle.

The oral irrigation/liquid delivery device provides flow controlled fluid to body areas specifically the mouth, or parts of body or other non-body areas via pump device or connection to water source through a wand handle with bulbous smooth head with multiple openings/orifices for the fluid to flow to ensure that no high-pressure jets result (unless within the design) and can be used in confined area; idea for irrigating or rinsing the mouth after jaw surgery or other situation where it is not possible or recommended to use a high-pressure “water pick” type of device; allows user who may have a problem sucking in water to rinse to have fluids safely delivered to mouth to clear and clean it; allows for the delivery of medicated and or other liquid delivery of water or any other liquid to rinse or even imbibe; said device could also deliver feeding fluids; optional connection via any pump or faucet diverter system to delivery fluids, including option to have a siphon mix of one solution along with another with the secondary solution being introduced to the flow as a result of the pump mechanism or a siphon mechanism based upon the flow of a fluid that is the primary solution. Optionally, a rubber or other suitable tube or hose may be connected between the wand and the tip/connecting point to the pump or fluid delivery device. The same device or its components could be incorporated into other devices such as water bottles or syringe ends.