| 摘要 |
<p>The appliance includes a system (18, 20, 22, 24) for producing a spray of liquid effective in cleaning biofilm from teeth, including a nozzle assembly (14) with an opening (38) through which the spray exits at a distal end thereof. An obstruction member (40) is positioned within the nozzle opening, configured in size relative to the area of the nozzle opening to produce a torroidal vortex movement of liquid (48, 50) as the liquid exits from the nozzle opening.</p> |
