A Scanning Electron Microscopic Observation of Trabecular Repair in Fracture Healing of Cancellous Bone

Aim: To study trabecular repair patterns in fracture healing of cancellous bone after osteotomy was made between the medial and lateral femoral condyle of rabbits. Methods: Eighteen adult New Zealand rabbits were used in this experiment. A complete osteotomy between the medial and lateral femoral condyle was performed, and then the bone was fixed with plaster, cortical and cancellous screws, respectively. The distal femoral condyle was observed by scanning electron microscope at 3 and 6 weeks. Results: The trabecular repair pattern of cancellous bone with plaster and cortical screw was accomplished with woven bone. Trabecular repair pattern of cancellous bone with cancellous screw was completed by lamella bone. Conclusion: There are two patterns of direct and indirect bone formation during cancellous bone healing of femoral condyle of rabbit.