What is the surface area described for air abrasion?

• A. 0.11 mm^2
• B. 1.0 mm^2
• C. 0.5 mm^2
• D. 0.01 mm^2

Answer: (A)

Air abrasion is used to create a micro-roughened, localized surface that enhances bonding while preserving as much tooth structure as possible. The surface area typically described for this technique is a small, controlled window—about 0.11 mm^2. This value reflects the minimally invasive goal: enough area to provide micromechanical retention for a resin bond without removing excessive tooth structure. Larger areas, like 0.5 or 1.0 mm^2, would imply a more extensive prep than air abrasion usually yields, while a much smaller area, such as 0.01 mm^2, might not produce sufficient roughness for reliable bonding.