Fig. 10.

(A) Scheme illustrating the modality of connection between the periosteal-derived canal system and the Haversian system. Four levels of the periosteal-derived canal network have been represented with a square-mesh net of different colours and projected on the horizontal plane. It has been assumed that the cutting cones advance along a direction perpendicular to this plane. There are three possible intersections: (A) the cutting cone does not intersect any periosteal derived canal at any level; (B) it intersects a canal at one level; and (C) it intersects a canal at two levels. The probability of intersection in this model depends on the relative position of the advancing cutting cone and the periosteal-derived canal network, but also on the sizes of the net meshes and the density of cutting cones. (B) Three-dimensional organization of the intracortical canal system in the process of growth and development of a long bone.