In which of the following situations can air abrasion not be used?
Caries excavation
Debriding pits and fissures
Cavity preparation
Stain removal
Although promoted for caries excavation, air abrasion is not able to produce well-defined preparation wall and margin details that are possible with conventional rotary cutting techniques.
Ref: Sturdevant's art and science of operative dentistry. 4th edition page 328