A total of 5 non-study subjects with chronic periodontitis were recruited and used for the calibration exercise. Two designated examiners measured full-mouth probing pockets depths (PPD) for all 5 subjects. On the same day (with a minimum of 15 min separation), the examiner repeated the examination. Upon completion of all measurements, the intra-examiner repeatability for PPD measurement was assessed. The examiner was judged to be reproducible after fulﬁlling the pre-determined success criteria (the percentage of agreement within 2 mm between repeated measurements had to be at least 70 %). The examiner showed 78.3 % reproducibility.