Question

What is the recommended working force applied when using a CPITN probe?

• A. Less than 20 grams
• B. Less than 10 grams
• C. Less than 5 grams
• D. Less than 15 grams

Hint:

CPITN probe force should be light — approximately 20 grams (similar to the force needed to blanch the fingernail).

Answer 1

The Correct Option is A

Step 1: Understanding CPITN Probe.
CPITN stands for Community Periodontal Index of Treatment NeedsIt is a specially designed periodontal probe used for screening periodontal statusThe probe has a ball tip of 0.5 mm diameter and a colored band for standardized measurement
Step 2: Importance of Controlled Force.
While examining periodontal pockets, excessive force can cause pain and inaccurate pocket depth readingsTherefore, a light and controlled probing force is recommendedThe ideal probing force for a CPITN probe should not exceed 20 grams
Step 3: Analysis of Options.
(A) Less than 20 grams — This matches the recommended standardized probing force
(B) Less than 10 grams — Too light and may not provide accurate readings
(C) Less than 5 grams — Insufficient for proper periodontal assessment
(D) Less than 15 grams — Not the standard recommended value
Step 4: Conclusion.
Thus, the recommended working force when using a CPITN probe is less than 20 grams