A dental appliance having a passive arrangement for drawing liquid from a reservoir (22, 33, 54) in the appliance by action of a stream of gas, which can be provided by a source of compressed gas (31, 34) or other system. The liquid mixes with the gas, resulting in liquid droplets which are directed through an orifice (18, 42, 68) at the end of a nozzle portion (12, 39, 66) of the appliance.デンタル器具は、圧縮ガス供給源３１，３４又は他のシステムにより供給され得るガスストリームの動作により当該器具においてタンク２２，３３，５４から液体を引き込むための受動的構成をもつ。液体はガスと混合し、当該器具のノズル部分１２，３９，６６の端部の開口部１８，４２，６８を介して指向される液滴をもたらす。
