This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
In which of the following situations can air abrasion not be used? 
Select and explain. 
A. Caries excavation, B. Debriding pits and fissures, C. Cavity preparation, D. Stain removal
C: Cavity preparation
Answer: C: Cavity preparation 
Explanation: 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