<prompt> In which of the following situations can air abrasion not be used?Caries excavationDebriding pits and fissuresCavity preparationStain removal  <response>: 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: Sturdevants art and science of operative dentistry. 4th edition page 328 