A dental drill head, constituted of a head housing, a wind wheel, and bearings, the head housing being constituted of a head housing cover and a head housing cavity, and the wind wheel being constituted of a wind wheel shaft and wind wheel blades. An anti-suck-back device is configured between the head housing cover and a wind wheel shaft end part to which the wind wheel shaft corresponds. The present invention, which adopts the aforementioned technical scheme, firstly makes it possible to reduce the intake in of contaminants when suck-back is taking place as the impeller is braked; and secondly, while there is still a positive pressure inside the head, the rubber head covering uses elastic force to brake the impeller and completely prevents the intake of contaminants. Moreover, the structure is simple and costs are low. Since the pressing area is reduced and the cavity is arranged between the rubber layers and the head covering, the teeth are less susceptible to touching the pressing portion. Even when the teeth do happen to touch the pressing portion, the cavity is so arranged that the teeth still will not touch the brake disc, thus avoiding any effect on the rotational speed; arranging the rubber ring inside the annular slot both prevents suck-back and automatically adjusts the dynamic balance, which is a double advantage and also lowers costs.

The present invention provides an air driven dental handpiece device with a back end configured to receive an air and water supply; a handpiece body having an air intake tube and a water line tube carrying air and water respectively through the device; and a head receiving air to power the device's dental spindle. The head securely blocks air from leaking and returns the air through a large air return exhaust port back through the inside of the body and out a rear air exhaust assembly including a plurality of exhaust air holes and/or an air return exhaust port. The device helps eliminate a patient's sensitivity and discomfort, helps eliminate the risk of surgical air emphysema, as well as helps eliminate any cross contamination during oral surgical procedures.

A system for dental tissue treatment includes a system for directing a laser beam to an area of dental tissue to be treated, and a fluid-delivery system for directing and controlling a flow of a fluid. The fluid is directed to at least a portion of the area to be treated and the fluid flow is controlled to substantially prevent both a change in laser energy absorption by the dental tissue and attenuation of treatment efficiency due to fluid interference with the laser beam. The fluid present in at least a portion of the area to be treated may prevent or reduce the likelihood of melting of enamel in that area.

A prophy angle system includes a the prophy angle, a hand piece configured to drive a central shaft within the prophy angle, means within the hand piece for advancing at least one push rod from a distal end of the hand piece, and a paste cartridge configured to fit within the cavity of the prophy angle without interfering with rotation of the central shaft, the cartridge including a plunger positioned at a proximal end of the cartridge such that when the at least one push rod pushes against the plunger in a distal direction, paste may be dispensed distally through the cavity in the prophy angle and into the prophy cup.

Apparatus is provided for use with a dental handpiece, a drill bit, an oral surgical guide, and a bushing disposed in the oral surgical guide. The apparatus includes a rigid guide-sleeve having a proximal end and a distal end. The proximal end of the guide-sleeve is removably couplable to a distal end of the dental handpiece, such that a distal outer surface of the guide-sleeve and a drill bit coupled to the distal end of the dental handpiece are coaxial along a central longitudinal axis of the drill bit. The distal end of the guide-sleeve is sized and shaped to be slidably couplable with the bushing, such that upon the guide-sleeve being advanced into the bushing the dental handpiece is forced to align the central longitudinal axis of the drill bit to be coaxial with a central longitudinal axis of the bushing.

An apparatus including: a lumen scanner (260) configured to scan a body lumen and acquire data for rendering a 3D model of the body lumen. The lumen scanner includes: an optical sensor (240) configured to acquire images of the body lumen while the lumen scanner is disposed inside the body lumen; and a fluid nozzle (202) configured to direct fluid onto an area of the body lumen imaged by the optical sensor while the lumen scanner is disposed inside the body lumen.

The present invention provides a method for dental cutting including the steps of providing a dental unit water line irrigation system, the dental unit water line irrigation system including a container surrounding a solution chamber; providing a lubricant for use in the dental unit water line irrigation system, the lubricant defining a composition including 10 to 25% by weight of ethanol; 5 to 25% by weight of glycerol; 10 to 25% by weight of xylitol; 0.5 to 5% by weight of a nonionic surfactant and emulsifying agent; 0.15 to 0.5% by weight of a plurality of flavoring agents; and 45 to 60% by weight of water; and selectively operating the water line irrigation system to express the lubricant onto a dental cutting site.

A water coolant circuit for a dental unit includes a plurality of defined dental device positions to which dental devices that use water coolant can be connected and a water coolant valve connected to the plurality of dental device positions and connectible to a pressurized water coolant source. The water coolant valve is operable via pulse width modulation (PWM) and selectively controllable to supply the water coolant from the water coolant source to at least one of the plurality of dental device positions at a time. The water coolant valve used for the plurality of dental device positions can have an associated water holdback valve for each of the dental device positions. A new proportional air coolant valve is described.

Some embodiments include a dental laser system with a controller coupled to an electromagnetic energy source, where the controller's graphical user interface enables a user to provide input to control operating parameters of the electromagnetic energy source. In some embodiments, the graphical user interface can render a controller enabling user control of a plurality dental laser system parameters with a single action or input. In some embodiments, the user's interaction with a graphical portion of the controller sufficient to control more than one operational parameter of the dental laser system without a requirement for the user to provide an additional or substantially simultaneous interaction with any other controller or portion of the graphical user interface. Further, the graphical content has a graphic indicative of a mode, an operational status, and/or an operational parameter of the dental laser system that is displayed, updated, or animated by the controller.

A self-illumination dental handpiece includes a shell having a receiving space. The shell is assembled to a working room. An electricity-generation device is in the receiving space and includes first and second housings. A rotatable fan is in the second housing. The fan is coaxially connected to a magnet bar that is surrounded by a coil. The coil is electrically connected to a first conductive terminal engaged with a second conductive terminal, and the second conductive terminal is connected to a light-emitting device by a wire. A gas inlet pipe, a backflow pipe, a cooling-water pipe, and a cooling-gas pipe are in the receiving space. The pipes are positioned by a positioning member. The gas inlet pipe is connected to an external gas supply and the working room, and the backflow pipe is connected to the working room and the electricity generation device.