Dental burr and dental handpiece.

摘要

A dental burr (1, 6) has an axis of rotation and a cooling water passage (4, 8) extending therethrough in coaxial relation to the dental burr. The cooling water passage opens to a front end face of the dental burr, and this opening (4b, 8b) in the front end of the dental burr is disposed in an area including the axis of rotation of the dental burr. A dental handpiece for rotatably holding a dental burr includes a handgrip portion (11), a hollow head portion (12) provided at a front end of the handgrip portion, and a cooling water passage (60). This cooling water passage (60) extends along the handgrip portion, and opens at one end to a rear end of the handgrip portion while the other end thereof is connected to an internal space (20) of the head portion. Part (21) of the internal space serves as a passage for communicating the cooling water passage of the dental handpiece with the cooling water passage of the dental burr held by the dental handpiece.