Thirty specimens of Glis glis orientalis born in captivity were used in this study. In captivity, animals were fed on hazelnuts, chestnut, apple, biscuit, acorn and sunflower seeds under uncontrolled conditions. Cranial and dentition features were examined from 45 days to 1824 days. At the age of 45 days, teeth were not worn, the cusp pattern of P4 was not recognisable, and the cusps of M3 and M3 had not erupted from dentary. In 126 days old, cusp line of M3 and M3 reached M2 and M2, and the cusp of P4 had developed. In 186 days old, tooth had started to wear.