A method of delivering an abrasive material, usually aluminium oxide, under high pressure. The average particle size is 27.5 microns and the nozzle tip exit pressure commonly employed ranges between 60 and 120 pounds per square inch. It is a non-rotary technique used to cut small cavities in enamel, dentine or to remove surface accretions or stain. The nozzle tip is usually placed less than 1mm from the tooth surface to minimize the cone-shaped particle scatter. It is an alternative in some situations to using the air turbine for cavity preparation.
Banerjee A., Watson T. F. Air abrasion: Its uses and abuse. Dent Update 2002;29:340–46.
http://www.webmd.com/content/article/66/79601.htm WebMD page providing an overview of restorative dentistry using air abrasion.