1. Injury results in avascular necrosis of the odontoid process over a period of months or years.

2. Fractures of the odontoid process of the axis . 1974.

3. There were 15 cases with deviation of the odontoid process and 8 with widened atlantodentilis.

4. Objective To study the applied value of multi-slice spiral CT(MSCT)in the diagnosis of odontoid process fractures.

5. Objective:Introduce the surgical technique of anterior screw fixation in odontoid process fractures.

5. try its best to gather and make good sentences.

6. Objective To study the feasibility of APOFIX internal fixation system and granule bone graft in treatment of Odontoid process fracture through cervical posterior approach.

7. Objective To explore the therapeutic effects of posterior transpedicular screw internal fixation in atlas for old fracture of odontoid process.

8. Methods APOFIX internal fixation system and granule cancellous bone autograft and fusion were used to treat 8 patients with early fracture of Odontoid process through cervical posterior approach.

9. Objective To compare the clinical effectiveness of fixations of odontoid process fractures preliminarily with anterior single one-threaded and double-threaded canulated compressive screws.

10. Objective To explore the nursing cooperation of internal fixation on odontoid process fracture by transoral-transpharyngeal approach.

11. Conclusion APOFIX internal fixation system is a simple, safe and stable method. It is suitable to use in treating fracture of Odontoid process through posterior approach.

12. A comparative study of fixation techniques for type II fractures of the odontoid process.

13. Conclusion: The anterior percutaneous screw fixation is less traumatic than conventional approaches for aged people in dealing with odontoid process fractures.