SUMMARY Whatever our origins, we are all directly linked by our common ancestors. The brief period that separated the birth of different populations of Homo sapiens that inhabit the Earth explains the homogeneity of the craniofacial architecture of our species. However, some differences to the face show significant interpopulational variations. This is true in the case of dental maturity and the position of the lower incisors , two particularly important factors that mold our orthodontic analysis. This article proposes to do a synthesis of the interpopulational variability of these two parameters.