ANGIOGRAPHIC STUDIES OF TIBIAL BONE USING BONE CEMENT AND BONE GRAFT IN DOG
Objective: to assess angiographic changes in tibial bone after using bone cement and autogenous bone grafts.
Materials and Method: 15 clinically healthy adult dogs, 2 to 4 years of age and weighing 20 to 30 kg were divided into 3 groups of 5 animals each. A 3 cm piece of mid-shaft tibia was removed from the left leg. In group I (control), repair involved the use of a suitable intramedullary pin. In group II the gap was filled with rib bone and the limb was immobilized by external coaptation. In group III, the gap was packed with bone cement for 30 days, then the cement was replaced with autogenous iliac chip bone, and a bone plate applied. Angiography was done on days 0, 15, 30, 45 and 60 by injecting 20cc of angiograffin into the femoral artery. The changes in the popliteal artery were noted.
Results: There were significant changes (P<0.05) in the popliteal artery in group I and II animals on days zero and 30. There was a significant increase in neovascularization, arteriole tufts, and the extraosseous blood vessel network in all three groups on zero through 45 post-operative days. The extraosseous blood vessel network at the fracture gap was much more obvious in group I as compared to group II and III animals.