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
Which of the following regarding air abrasion is false? 
Select and explain. 
A. No tactile sensation, B. It can be a substitute for acid-etching technique, C. Cannot be used for cavity preparation, D. All of the above
B: It can be a substitute for acid-etching technique
Answer: B: It can be a substitute for acid-etching technique 
Explanation: Roughening by air abrasion by itself is not a substitute for acid-etching techniques. Roughening improves bonding. Acid etching alone or after roughening, however, always produces a better bond than air abrasion alone.
Contemporary air abrasion equipment is helpful for stain removal, debriding pits and fissures before sealing and micromechanical roughening of surfaces to be bonded.
Ref: Sturdevant's art and science of operative dentistry. 4th edition page 328