Histological preparations 90 days after the second surgery, HE, using a 10× objective and the scale bar is 100 μm, in groups 2, 3 and 4. G = Groups, NU = nonunion area, CT = cartilage, B = bone. M = medulla. There was no bone consolidation in Group 2. In Group 3, almost all of the fractured area was filled with bone, with a small area of cartilage interposed. In Group 4, there was partial bone consolidation, with a significant amount of cartilage in the fracture line.