Background: Reamed nailing gives better fracture healing than unreamed nailing in operative treatment of fractures and nonunions. This study investigates the effect of isolated reaming debris on fracture healing in an animal model.
Methods: Thirty sheep were treated with an osteotomy of the tibia with 5-mm distraction. In one group, the osteotomy gap was left empty; in the second group, the gap was packed with reaming debris from the ipsilateral femur; and in the third group, the gap was packed with cancellous bone from the iliac crest. At follow-up, callus volume was measured on standard radiographs.
Results: After 3 weeks, callus volume from the reaming debris group as well as the iliac crest group had increased significantly compared with the empty group.
Conclusion: This study shows that isolated reaming debris supports callus building as much as conventional bone grafting, which might explain why fractures heal with more callus formation when treated with reamed nailing compared with unreamed nailing.
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