A cannula for a multifunction dental syringe includes a fastener bushing that is defined by a circular opening, an end wall, and a side wall comprising a circular cylinder. The cannula also includes at least two channels enabling fluids to be conveyed separately or together from the end wall to fluid projection orifices, and beginning in the end wall beside each other. The cannula is arranged so that the circular cylinder presents a cutout in the thickness of its wall. The cutout comprises, going from the opening, at least one segment extending in a direction other than the axial direction of the cylinder followed by a longitudinal segment extending towards the end wall.
