1. Neurotization using a part of ulnar nerve is a practicable procedure for restoration of elbow flexion in upper trunk avulsion of brachial plexus.

2. Angiogenesis and neurotization are very important factors in the development and regeneration of bone.

3. Methods Relevant literature was extensively reviewed. The new development, the advantages and disadvantages of extraplexal neurotization were comprehensively evaluated and analyzed.

4. Objective?To treat upper trunk avulsion of brachial plexus by neurotization using a part of ulnar nerve. The clinical outcome and the role of intraoperative EMG monitoring was discussed.

5. And it providing a new method for the investigation of vascularization and neurotization of bone tissue engineering.

6. But many studies show that if we do some effective measures to protect endothelial cells instead of activating neurotization only, maybe, we could get better clinical effect .

7. Objective: Using tissue engineering methods to construct a new animal model for the investigation of vascularization and neurotization in bone tissue engineering.

8. Conclusion The resection of the traumatic neuroma combined with nerve grafting and neurotization is really effective in the treatment of early OBPP.