Dental syringe (1) comprising: a supply cord (2) connecting it to a dental unit, a housing (3), a nozzle (4), a couple of valves supplying and stopping water and air, and heating elements (20, 26) for the supplied fluids, switchable on by a ring nut (10), wherein the heating systems are contained inside housing (3) and comprising means (21, 22, 27, 28, 29) for fluids temperature control, capable of keeping said fluids warm even when syringe (1) is at rest, and in that the water heating system comprises a heat exchanger (13) and at least a heating element (20), a temperature sensor (21) at the heat exchanger, a temperature sensor (22) at the exit from the heat exchanger (13), and a microprocessor (29).
