The present invention relates to a dental device for shaping and simultaneous flushing and suction of a tooth root canal, a head of a dental device for shaping and simultaneous flushing and suction a tooth root canal by shaping the tooth root canal and a hollow endodontic file for shaping and simultaneous flushing and suction a tooth root canal by shaping the tooth root canal.

Disclosed herein is a dental device for delivering fluid continuously while activated in an endodontic application. The dental device includes a hollow needle having a tip end and a connector portion; and a handle. One end of the handle is configured to be affixed to the connector portion of the hollow needle. The opposite end of the handle is capable of being attached to an endodontic handpiece or a sonic agitator for the activation. The connector portion includes at least one tube connector that is an integral part of the connector portion of the hollow needle or a plurality of openings on the connector portion to accommodate the hollow needle to a connector. The connector is a modular fluid delivery connector which is removable from the needle such that it can be reused.

A dental instrument for use with a dental handpiece cleans and disinfects tooth root canals. The instrument includes a shaft and connector for releasable attachment to the handpiece, the shaft including at least a tip end, a distal portion approximate to the connector, and at least two radial protrusions extending along length of the shaft with a longitudinal groove extending between the at least two radial protrusions.

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.

The invention relates to a method for producing a dental drill that has a shank (1) and a work section. The shank contains a centrally arranged, continuous first channel (3). The work section contains one or more continuous, spiral-shaped further channels (4a, 4b). The first channel and the further channels open into a common chamber (5) connecting the shank and the work section. The shank is sintered with the work section in order to form a one-piece, sintered component that encloses the chamber connecting the shank and the work section.

A medical drill bit comprises an accommodating slot disposed concavely on a main body of the medical drill bit, a separate board disposed in the accommodating slot to separate the accommodating slot into a first slot and a second slot, and a lid engaging with the separate board and covering the accommodating slot. The lid and the separate board do not rotate with the main body when the main body in rotation. The accommodating uses to fill with cooling liquid which able to be pumped out from the accommodating slot, and fresh cooling liquid is able to inject into the accommodating slot for cooling the drill bit in rotation.

A surgical drill type cutting tool includes a shank and an active portion extending in the extension of the shank, with chip areas extending along the active portion, and a ring surrounding a part of the active portion, an inner surface of the ring engaging the active portion without closing off the chip areas, allowing irrigation fluid to provides useful irrigation over most of the length of the active portion of the surgical drill bit.

A fluid-driven medical or dental handheld device includes a head, the head including a housing and a impeller rotatably mounted in the housing. The housing defines a receiving chamber for receiving the impeller, a main air inlet and an air outlet being defined in the housing and communicating with the receiving chamber. An inner surface of the housing surrounding the receiving chamber defines a plurality of grooves, the grooves being arranged at intervals along a circumferential direction of the housing. The grooves reflect rotating airflows directed to the grooves to change directions and speeds of the airflows to form interference airflows, which can effectively reduce the rotation speed of the head at idling, while ensuring the torque output of the head during grinding teeth.

A dental instrument for use with a dental handpiece cleans and disinfects tooth root canals. The instrument includes a shaft and connector for releasable attachment to the handpiece, the shaft including at least a tip end, a distal portion approximate to the connector, and at least two radial protrusions extending along length of the shaft with a longitudinal groove extending between the at least two radial protrusions.

A fluid-driven medical or dental handheld device includes a head, the head including a housing and a impeller rotatably mounted in the housing. The housing defines a receiving chamber for receiving the impeller, a main air inlet and an air outlet being defined in the housing and communicating with the receiving chamber. An inner surface of the housing surrounding the receiving chamber defines a plurality of grooves, the grooves being arranged at intervals along a circumferential direction of the housing. The grooves reflect rotating airflows directed to the grooves to change directions and speeds of the airflows to form interference airflows, which can effectively reduce the rotation speed of the head at idling, while ensuring the torque output of the head during grinding teeth.