High migration rates in the last years put forensic age estimation of living people at the forefront of forensic research. The established standard for age estimation uses images acquired with ionizing radiation, therefore radiation-free alternatives such as MRI are currently of high interest. In this study a CT based multifactorial approach that combines wisdom teeth and clavicles was validated with MRI data. The sensitivity to estimate subjects under 18 years of age as minors with MRI lies above 93%. Our results showed that MR could replace the CT based multifactorial Approach.