| 摘要 |
A dental handpiece which has a connecting fitting for attachment to a supply hose having at least one agent supply line, a head section having a compressed air drive motor, a grip portion extending between the fitting and head section and a passage in each of said head section, grip portion and fitting for compressed air and a separate passage in each of these for any additional desired agents, characterized by the grip portion having a tubular sleeve portion, which is connected to the head section and receives the passage for compressed air and any other passages for agents, if present, and means detachably connecting the grip portion to the connecting fitting and includes means enabling relative rotation of the sleeve portion to the fitting so that the sleeve portion and each passage of the head section are rotatable relative to the fitting and each passage therein. Preferably, the head section and the sleeve portion are a single component and the handpiece will include a valve means for controling the flow of at least one of the agents to the head section.
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