air-powder polishing

air-pow·der pol·ish·ing

(ār powdĕr polish-ing)
Technique for extrinsic stain removal that uses a mixture of warm water, sodium bicarbonate powder (as an abrasive to remove stains), and air. Action of sodium bicarbonate varies with grit used.

air-powder polishing,

n a technique for plaque and stain removal in which sodium bicarbonate particles and water are propeled against the teeth in a regulated flow using air and water pressure. Also called
airabrasive or
airbrasive.