An automated dental drill includes an end effector, including a dental tool for disposition at least partially in a patient's mouth and to perform an operation on a tooth. A tooth clamp releasably rigidly attaches to at least one tooth. A drive assembly is controlled by a processor and positions the end effector with a first at least three degrees of freedom, relative to the tooth clamp. The drive assembly remains outside the patient's mouth. A clamp connector connects the tooth clamp to the drive assembly. With the tooth clamp coupled to the drive assembly and the tooth clamp attached to the at least one tooth, position and orientation of the drive assembly remain fixed, relative to the at least one tooth. A passive cantilever arm, mechanically coupled between a support structure and the drive assembly, has a second at least three degrees of freedom and supports the drive assembly.

A head assembly for a dental contra-angle hand-piece and a dental contra-angle hand-piece are provided. The head assembly includes a hand-piece main body, a reversing valve movably connected to the hand-piece main body, and an inner water tube connected to the hand-piece main body, wherein the hand-piece main body is provided with a first flow channel and a second flow channel independent from each other, the first flow channel is configured to be in communication with a liquid outlet of a motor, and the second flow channel is configured to be in communication with an external pipeline; the reversing valve is provided with a confluence channel, the reversing valve is configured to enable, when moving relative to the hand-piece main body, the first flow channel and the second flow channel to alternatively be in communication with the inner water pipe through the confluence channel.

An assembly with a handpiece assembly configured to receive electromagnetic energy and fluid, and to selectively deliver the electromagnetic energy and/or the fluid to a target surface. The handpiece assembly includes a handpiece housing and a plurality of fluid lines extending through the handpiece housing. The plurality of fluid lines can transfer fluid from a proximal end of the handpiece assembly to a distal end of the handpiece assembly. A spray mixer can be positioned at the distal end that is coupled to fluid lines of the plurality of fluid lines. An air input port can be positioned at the proximal end that is configured to be coupled to an auxiliary air hose, and an air delivery channel can be coupled to the air input port, and can supply air to a tip of an exchangeable applicator that can be coupled to the distal end of the handpiece housing.

A dental handpiece includes: a head including a holder configured to hold a cutting tool, a tool rotation mechanism configured to rotate the cutting tool, a housing including the holder and the tool rotation mechanism, and a cooling passage formed in a side wall of the housing; and a grip including a first air supply passage configured to supply first air for cooling the tool rotation mechanism, and a second air supply passage connected to the cooling passage and configured to supply the head with second air lower in flow rate than the first air. The head is joined to the grip such that, of an angle formed between a rotation axis of the cutting tool and a major axis of a coupling portion of the grip which is coupled to the head, an angle on a cutting edge side of the cutting tool is an obtuse angle.

The dental handpiece has a handle and a housing with a first light-emitting diode and a first optical sensor. The housing also has a second light-emitting diode, a second optical sensor, shielding windows for each optical and apertures for supplying compressed air to each shielding window. A diffuser is located in each aperture, the diffuser being adapted to generate an air jet forming an air curtain. The dental handpiece can provide a reliable protection of the optical sensors by the air curtain and a high-quality three-dimensional image of an oral cavity during manipulation.

A dental handpiece system includes a dental handpiece for operating a dental burr and providing a stream of water to the dental burr for cooling a tooth being acted upon by the dental burr. The dental handpiece further includes a flush water port for providing a flush water stream that is directed away from the dental burr to allow the dentist to flush a work site in a patient's mouth. The dental handpiece can also include an air outlet for providing a stream of air that is also not directed to the dental burr and that can be used to dry other dental instruments as well as work sites in the patient's mouth.

An automated dental drill includes a dental drill housing that includes a mouthpiece housing section and a one or more degrees of freedom drive housing section; an end effector drive support having a shaft section that is at least partially positioned in the mouthpiece housing section, and an end effector for the cutting of a native tooth or dental appliance to a desired tolerance. The end effector is positioned on the end effector drive support. The automated dental drill also includes a power source that drives the end effector and is coupled to the end effector and a one or more degrees of freedom drive assembly to direct the end effector along one or more degrees of freedom relative to the mouthpiece housing section.

A dental handpiece includes: a body; and a head. The body includes a supply tube configured to supply air to the head. The head includes: a housing, a holding portion disposed in an inside of the housing and configured to hold and rotate a cutting tool, and a protruding portion protruding from a specific surface and having an opening through which the cutting tool is inserted into the holding portion, the specific surface corresponding to an inner-diameter-side bottom of the housing through which the cutting tool passes. The protruding portion has at least one discharge path provided at a specific position closer to a tip end of the cutting tool than the specific surface and configured to receive the air supplied from the supply tube at the specific position, guide the air to an outer circumferential side of the head and discharge the air to an outside.

A dental handpiece system includes a dental handpiece for operating a dental burr and providing a stream of water to the dental burr for cooling a tooth being acted upon by the dental burr. The dental handpiece further includes a flush water port for providing a flush water stream that is directed away from the dental burr to allow the dentist to flush a work site in a patient's mouth. The dental handpiece can also include an air outlet for providing a stream of air that is also not directed to the dental burr and that can be used to dry other dental instruments as well as work sites in the patient's mouth.

A system for producing a powder-gas jet for performing a dental treatment, wherein the system is configured for being connected to a dentist chair by a connection, wherein the connection of the system to the dentist chair allows the system to be fed by a pressurized gas flow, the system comprising a compressed gas circuit configured to direct the pressurized gas flow into a powder-gas-mixing chamber to form a gas-powder mixture, the system being wherein the compressed gas circuit comprises at least a pressure regulation device having an inlet and an outlet, the regulation device being configured to provide the pressurized gas flow with a pressure at its outlet that is independent of the pressure of the gas flow at its inlet, when it is fed by the pressurized gas flow.