| 摘要 |
A cartridge type dental handpiece (10) contains a handpiece main body (11), a head housing (12) provided at a distal end of the handpiece main body (10), and a cartridge (13) detachably adapted within the head housing (12). The cartridge (13) has a cartridge casing (26) and a rotatable sleeve (23) rotatably mounted within the cartridge casing (26) and adapted for detachably holding a dental burr (15). The dental handpiece (10) further contains a fluid passage (17, 18, 20, 21) defined between an inner surface of the head housing (12) and an outer surface of the cartridge casing (26) when the cartridge (13) is mounted within the head housing (12), a fluid spraying port (22) formed in a lower surface of the cartridge casing (26) in communication with the fluid passage (17, 18, 20, 21) for spraying the fluid from the fluid passage (17, 18, 20, 21) onto a tooth being treated, and a communication port (31, 32) for supplying the fluid from a fluid supply duct (29, 30) within the handpiece main body (11) into the fluid supply passage (17, 18, 20, 21). <IMAGE> |
