| 摘要 |
A dental syringe for the dispensing of a relative viscous dental material that includes a readily replaceable barrel portion that defines a reservoir for containing a bulk supply of a dental material having a spout or nozzle discharge end to which a dispensibly nozzle tip is detachably connected and which barrel portion is sealed by a displaceable plug. A plunger is provided for effecting the displacement of the plug for effecting the extruding of the material from the barrel portion as needed, and which plunger has formed on the end thereof a unidirectional vent arrangement which is operative for imparting a negative pressure on the end plug to permit a slight rearward displacement thereof to relieve the back pressure exerted on the plug by the material upon the termination of an extruding operation and thereby prevent drooling of any unwanted material subsequent to an extruding operation.
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