1. In group B, tympanoplasty with modified mastoidectomy was performed.

2. Methods:96 patients all underwent open radical mastoidectomy.

3. Conclusion Causes of failure of mastoidectomy include many.

3.

4. Conclusion:The success of radical mastoidectomy lies in improving hearing and the rate of dry ear.

5. Objective To explore the failure causes of mastoidectomy and precautions. In order to improve surgical skills.

6. Objective To explore the causes of failure of mastoidectomy and precautions.

7. Conclusion Aspiration simultaneously with mastoidectomy simple and effective methods in the.

8. Objective To study the occurrence mechanism and the clinical practice feasibility of cases of cavum tympani natural shaping after partial radical mastoidectomy .

9. Objective:To manage the back wall defect of external acoustic canal and opened mastoid cavity which was remained from radical mastoidectomy .

10. Methods Seventy- six cases of otogenic brain abscess were treated by aspiration simultaneously with mastoidectomy, and its effectiveness was analyzed retrospectively.

11. This paper reported experiences in preventing iatrogenic facial paralysis caused by ear surgery and in nerve grafting for severe nerve damage after modified radical mastoidectomy.

12. Conclusion:The blow oxygen method is a good way for the treatment of glue ear, and can short the time for dry ear after mastoidectomy.

13. Conclusion Plastic repair of cavity of concha, mastoid plombage, and thorough removal of pathological tissues are the keys to shorting the dry ear time after modified radical mastoidectomy.

14. Method: One case with necrotizing external otitis was treated with radical mastoidectomy and antibiotic.

15. Methods Among all 18 cases, 14 cases of neurolemmoma in the neck were treated by the lateral pharyngotomy and 3 cases by mouth, 1 case of facial neurolemmoma was resected by radical mastoidectomy.

16. Objecttive To explore prevention and treatment for non dry ears after radical mastoidectomy.

17. Objective:Total middle ear reconstruction can satisfactorily treat the problematic mastoidectomy cavities in patients following previous open mastoidectomy.

18. AIM: To introduce the clinical experience of the use of cervical plexus block in behind-the-ear incision mastoidectomy.

19. Objective A retrospective survey of 187 patients who underwent canal down mastoidectomy was performed in order to improve the outcome of the operation , emphasizing on otorrhea.

20. The patient was admitted and received antibiotic treatment, but a radical mastoidectomy was not performed. The patient died of septicemia and subsequent multiple organ failure.

21. Conclusion:Reconstruction of acusticus back wall and hearing after radical mastoidectomy with homograft costal cartilage is effective to prevent mastoid cavity infection and improve hearing.

22. Fig. 2 The pathologic changes only involved mastoid process area, but not the ossicular chain area; only simple mastoidectomy is given for treatment.

23. Objective To evaluate the efficacy of the pedicle the temporalis myofacial flap in modified mastoidectomy.

24. Objective:To reconstruct middle ear structure for open mastoid antrum with external auditory canal after radical mastoidectomy in one-stage.