Abstract: An insert for an ultrasonic scaling instrument includes an elongated body. A plastic gripping collar surrounds the insert near one of the ends. A fluid input port is on an end of the collar. An internal conduit extends between the fluid flow input port through the plastic collar to a fluid flow output channel. A metal fluid flow output conduit is rigidly clamped by the collar into a portion of the fluid flow output channel. An output end of the conduit is directed toward an adjacent scaling tip carried by the insert. The fluid from the conduit is directed onto a portion of the scaling tip. Depending on fluid flow pressure, part of the fluid can be directly scattered thereby, and part of the fluid can flow along the tip to an end thereof and then be scattered at the end. The collar provides a rigid coupling between the conduit and the body portion so that vibrations of the body portion do not alter the relative position of the output conduit relative to the tip.