Tojiyev, F.I., Azimov, A.M. and Aralov, M.B. 2021. Etiology, Classification, Frequency of Bone Defects and Lower Jaw Deformation (Literature Review). Central Asian Journal of Medical and Natural Science. 2, 4 (Jul. 2021), 31-35. DOI:https://doi.org/10.17605/cajmns.v2i4.239.