How much of the powered tip should be adapted to the tooth surface?

• A. 0-1 mm
• B. 4-6 mm
• C. 1-3 mm (ideally around 0.5 mm)
• D. 5-7 mm

Answer: (C)

The effectiveness of a powered scaler comes from having the vibrating tip close enough to transfer energy directly to the tooth surface. Positioning the tip just off the surface concentrates the cleaning action where calculus and biofilm reside, using the lateral edges of the tip to engage the deposits without burning or injuring soft tissue. The best approach is to keep the tip within a small distance, around 0.5 mm, and within a practical range of roughly 1-3 mm from the surface. This close adaptation lets the energy and spray effectively disrupt deposits; too far away and the energy dissipates and cleaning becomes inefficient, while going too close or pressing hard can irritate or damage tissues.