Difficulties in identifying developmental defects of the enamel: a BITA study

Aim To evaluate the ability to recognise different types of developmental defects of enamel (DDE) by a group of general dental staff, trained prior to the comprehensive prevalence study (the BITA study), and to compare their skills to that of an untrained group. To evaluate the validity and reliability of the DDE registrations and MIH diagnoses, 3 years after the BITA study ended. To evaluate the reliability of an MIH diagnose, 3 years after the study ended.