What training or calibration is recommended to ensure reliability in PSR scoring?

• A. No training is needed.
• B. Calibration only once in a career.
• C. Use different techniques for different examiners.
• D. Regular examiner calibration, standardized probing technique, and adherence to PSR guidelines to ensure inter-examiner reliability.

Answer: (D)

Consistent training and ongoing calibration are essential for reliable PSR scoring because the codes reflect specific probing findings, and small differences in how the probe is used can change the result. Regular calibration aligns examiners on probing force, angulation, and measurement reference, and reinforces strict adherence to PSR guidelines for assigning codes. This standardization reduces inter-examiner variability so that scores reflect true periodontal status rather than individual technique. Training only once or not at all leaves drift and differences in technique unchecked, while letting examiners use different methods would equally undermine reliability.