For hand instruments, what is the recommended adaptation distance?

For hand instruments, what is the recommended adaptation distance?

• A. 1-3 mm
• B. 0-1 mm
• C. 4-6 mm
• D. 5-7 mm

Answer: (A)

Adaptation distance is how close the cutting edge of a hand instrument sits against the tooth surface as you work. For effective calculus removal, the edge should be placed against the tooth within a close, controlled range—roughly one to three millimeters. This allows the edge to engage the deposit while you maintain stable control, the proper angulation, and a safe working clearance from the gingiva. If you try to work with the edge very close to the tissue (about zero to one millimeter), there's a higher risk of tissue trauma or accidentally burnsishing calculus instead of removing it. If you stay too far away (four to seven millimeters), the edge won’t contact the calculus effectively, making the strokes inefficient and less predictable.

Adaptation distance is how close the cutting edge of a hand instrument sits against the tooth surface as you work. For effective calculus removal, the edge should be placed against the tooth within a close, controlled range—roughly one to three millimeters. This allows the edge to engage the deposit while you maintain stable control, the proper angulation, and a safe working clearance from the gingiva. If you try to work with the edge very close to the tissue (about zero to one millimeter), there's a higher risk of tissue trauma or accidentally burnsishing calculus instead of removing it. If you stay too far away (four to seven millimeters), the edge won’t contact the calculus effectively, making the strokes inefficient and less predictable.