Measurement of root dentine transparency according to Band und Ramm (1970) is principally suitable for determination of age. Our own investigations of 601 teeth of 50 persons resulted in a regression function of y = 23.8 + 4.5 x +/- 15.3 in a coefficient of correlation amounting to r = +0/67. The best findings were obtained in persons between 30-60 years of age. This technique is particularly useful for the fast determination of age under conditions prevailing during autopsy. Gross errors of the age of teeth is possible. Therefore, all oral criteria are still required to obtain reliable estimations.