| 摘要 |
An all purpose dental syringe and delivery system for dispensing various types of dental materials as may be required in the performance of various dental procedures e.g. the administering of anesthesia, making impressions, performing root canals, filling cavities, etc. that includes a power handle having a plunger which is incrementally advanced upon each actuation of the power handle and a plurality of interchangeable barrel assemblies. Each of the plurality of barrels assemblies includes an associated dispensing nozzle, each being operative to dispense a particular dental material according to a given procedure. Co-operatively associated with the plunger are interchangeable plunger tips for complementing a particular barrel assembly for dispensing a particular material therefrom, and each barrel and associated parts are color coded to facilitate the use and application of the syringe. The power handle also includes an adjustment whereby the amount or volume of the material dispensed can be varied within predetermined limits. In one embodiment an arrangement is provided to prohibit extrusion of the dental material which may occur due to any residual buildup of pressure thereon after an extruding operation. |
