| 摘要 |
A dental syringe assembly has a handpiece connected to air and water lines and a tip for directing air and water flow into a patient's mouth. The tip has an enlarged cap that is detachably engageable with a sleeve structure of a head member of the handpiece. The sleeve structure may be provided in a connection piece that fits within a socket in the head member so that the connection piece can rotate but is retained against removal. A non-return valve may be provided within the head member to prevent return flow of contaminated water.
|
