Developing the dento-maxillary system (DMS) from birth (the age immediately after birth) up to the age of 12, involves a multitude of changes in the structure of this system. In the age of growth a sequence of deviations from the morphology and function of the dento-maxillary system appear. Thus, in this paper, we have approached certain aspects of both theoretical and practical nature, which can interfere in the formation and development of dento-maxillary system at the age immediately after birth.