HIERARCHIC SKELETAL ORGANIZATION – A FACTOR REGULATING THE STRUCTURE OF FATIGUE INJURIES. PART III. MODELING THE INITIAL STAGE OF THEIR DEVELOPMENT

The authors describe general conditions of fatique injuries (FI) initiation and development, and discuss the conformity between hierarchic skeletal organization levels and spatial differentiation of the initial FI types – local discrete and local meshlike. The former includes “sacrificial bonds” disruption, shearing along the hydrate level of inter-crystalline complexes, destruction of bonds between crystalline complexes. This lesion type may go through a process of self-remedying after annihilation of forces and spatial approximation of the involved structures. The local mesh-like FI type is characterized by destruction of the majority of adjacent structures and spatial unification of injuries (structural “loosening”). This type of lesion increasing in its dimensions creates discrepancy areas within itself forming the basis for fissure formation. This structural state of a fatigue injury is considered as intermediate between a diffuse lesion and a crack.