What is the recommended probing force expressed in grams?

• A. 10-20 grams
• B. 1-2 grams
• C. 100-150 grams
• D. 50-60 grams

Answer: (A)

Probing force is the amount of pressure you apply with the periodontal probe during pocket depth measurement. The aim is to contact the base of the sulcus or pocket without compressing the soft tissue, so the depth reading reflects the true depth. The recommended range is about 10 to 20 grams. This light, controlled pressure allows the probe to reach the bottom of the pocket while minimizing tissue distortion and bleeding. Pressing only 1–2 grams is usually too light to reach the base and can yield unreliable or shallow readings. Pressing 50–60 grams or more, or even 100–150 grams, risks compressing tissue, causing exaggerated readings, increasing discomfort, and potentially injuring the area. Keeping a consistent 10–20 gram force helps produce accurate, reproducible measurements.