What grasp is used when holding a periodontal probe?

• A. Modified pen grasp
• B. Palm grasp
• C. Universal grasp
• D. Digital pinch

Answer: (A)

Probing requires precise, controlled contact with the tooth surface and subtle finger and wrist movements. The modified pen grasp achieves this by holding the periodontal probe between the thumb and index finger, with the middle finger resting on the shank for stability. The ring finger serves as a fulcrum on a tooth or the tooth surface, helping to stabilize the hand and control the angulation and depth as you probe. This grip provides the best tactile feedback and delicate control needed for accurate pocket depth measurements.

The other grips are less suitable here: a palm grasp envelops the instrument and reduces precision; a universal grasp is suited for larger instruments and doesn't offer the same fine control; a digital pinch lacks the stability of the middle finger and fulcrum, making probing less steady.