FIELD: medicine, orthopedics, immunology, veterinary science. SUBSTANCE: cells of bone marrow, for example sternum of experimental animals or human sternum, are cultivated in diffusion chambers which are then implanted intraperitoneally for mice. In 7 days chambers are removed and cytological preparations are prepared from their content to count the number of clusters and colonies of monocytar-macrophageal and fibroblastic types, and according to their ratio a prognostic index is determined, and at its value > 1 defected flow of osteogenesis. EFFECT: lower traumaticity, higher efficiency for earlier revealing disorders connected with disorders of immunological regulation of distractional osteogenesis. 2 tbl
