Dental treatment appliance

A dental cleaning appliance includes a handle, a fluid reservoir for storing a working fluid, and a fluid delivery system for receiving working fluid from the reservoir, and for delivering working fluid from a nozzle to the oral cavity of a user. The fluid reservoir includes a fluid port from which fluid is dispensed from the fluid reservoir, and through which the fluid reservoir is replenished. The fluid reservoir is moveable between first and second positions to expose the fluid port. A stem extending between the handle and the nozzle includes a stop member for inhibiting movement of the fluid reservoir beyond the second position.