Which of the following regarding air abrasion is false?
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
No tactile sensation
It can be a substitute for acid-etching technique
Cannot be used for cavity preparation
All of the above