During the calibration process, 70 children (5.8% of the sample and not part of the study population) from a convenience sample were examined by two dentists. The examiners assessed the three conditions (dental caries experience, malocclusion, and TDI) and obtained inter-examiners agreement (kappa = 0.78–1.00). They re-examined the children after two weeks to assess intra-examiners agreement (kappa = 0.93–1.00).