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DYNAMICS OF THE BONE DENSITY OF THE MAXILLA IN HUMAN PRENATAL ONTOGENESIS IDENTIFIED BY COMPUTED TOMOGRAPHY

. In order to study the qualitative characteristics of the bone tissue of the upper jaw (UJ) of human pre-fetuses and fetuses, the combined research methods should be used , in particular, not only to study the mineral content of micro and macro elements, as the main building material of the bone, but also by studying the CT-density the cellular ridges of the UJ, which indicates the need and intensity of the distribution of mineral saturation on follicular formation, growth, and mineralization of the tooth germs. Conclusion. Established in the study, the regularities of the predominance of density (MO Hu) of bone tissue of the frontal and malar ridges of the UJ in the dynamics of the human prenatal ontogenesis are fundamental in functional anatomy, since the malar ridge of the UJ with the maxillary ridge of the zygomatic bone forms the anterior-lateral wall of the orbit that is a protective block for countering the lateral compression and a barrier for neurovascular bundles that lie in the bone sulcus of the part, and the frontal ridge of the UJ forms a fore-medial wall of the orbit and the lateral wall of the external airways and, obviously, this causes a physiological defense of the jaw-facial area of the fetus during the passage through the birth canal. This is a protective role for vital anatomical structures, i.e. the eyeball and the skeleton of the upper respiratory tract (ensuring their permeability during independent breathing from the moment of birth).