Читать книгу Fractures in the Horse - Группа авторов - Страница 43

Compact bone invariably contains microcracks, and an understanding of the modes of fracture must take into account their presence [31, 32]. The direction of crack propagation within the bone and the microstructure of the bone material have profound influences on fracture resistance. Transverse cracking, where the crack must course through longitudinally oriented osteons, is tougher than longitudinal cracking, where the crack splits osteons along the longitudinal axis of the bone [33, 34]. The process of bone remodelling increases resistance to crack propagation by adding secondary osteons and cement lines throughout the structure and by reorganizing osteons and trabeculae along directions of high stresses.