Fig. 1.

Developmental stress matched across the anterior dentition of the Scladina juvenile (gold-coated casts). (A–C) Maxillary dentition: central incisor (A), lateral incisor (B), and canine (C). (D–F) Mandibular dentition: central incisor (D), lateral incisor (E), and canine (F). The first stress event (blue arrow) was identified in the histological section of the upper first molar at 2.4 years of age, with the number of subsequent perikymata after this event indicated on each tooth. The number of periradicular bands between the cervix and subsequent stress event (green arrow) is indicated, with an average of 113 lines between events (904 days). Thus, this second event occurred at 4.9 years of age.