The lecture will focus on congenital and developmental dental abnormalities, i.e. enamel and dentin disorders (e.g. enamel ipoplasia and hypomineralization, dentinogenesis imperfecta), size, number and shape (e.g. gemination, fusion, concrescence, dilaceration, dens invaginatus, enamel pearls, carnassial-tooth malformation) abnormalities, eruption and exfoliation abnormalities. Participants will learn to recognize, diagnose and manage these conditions.