[Architecture of cancellous tissue of the scaphoid bone of the wrist].

The experimental-theoretical studies were performed to investigate the structure of substantia spongiosa of the scaphoid bone of the wrist. Morphological prerequisites for the typical fractures of scaphoid bone and for their delayed consolidation, as well as for the false joint development in some of its zones were found. The peculiarities in the structure of substantia spongiosa associated with the differences of magnitudes and directions of the loads applied to the various regions of scaphoid bone, were distinguished. On the basis of the results obtained, functional zones and two major force vectors were detected, that were shown to determine different biomechanical conditions under which scaphoid bone of the wrist was functioning.