Objective To analyze the stress and displacement distribution of 3D- FE models in three conjunctive methods of vascularized iliac bone graft for established mandibular body defects. Methods Using computer image process technique, a series of spiral CT images were put into Ansys preprocess programe to establish three 3D- FE models of different conjunctions. Results The three 3D- FE models of established mandibular body defects by vascularized iliac bone graft were built up. The distribution of Von Mises stress and displacement around mandibular segment, grafted ilium, plates and screws was obtained. Conclusion It may be determined successfully that the optimal conjunctive shape be the on- lay conjunction.
