الفهرس 
Introduction and reviewOnly 14 pages are availabe for public view
 |  | from | 97 |  |  |
| | | from | 97 | | |
Abstract
Asystematic search and Meta-analytic study done to Studying effect of different surgical techniques on outcome of mastoidectomy in chronic suppurative otitis media by Comparison between Canal Wall up and Canal Wall Down Mastoidectomy as regard hearing and recurrence rate.
The data were collected from articles fulfilling the following Inclusion criteria :
1- Patients who had undergone Canal Wall up and Canal Wall Down Mastoidectomy.
2- duration of follow up was reported.
3- pre and post operative hearinrg level was mentioned.
4- recurence rate was mentioned.
Data analysis was performed utilizing Meta-analytic Review Manager(Rev Man5) soft ware.
The results were as follow :
1- significant higher recurrence rate in Canal Wall up mastoidectomy 54 case (17%) from total number of 315 in contrast of 21 case (10%) from total number of 204 in Canal Wall Down.
2- significant difference between hearing level pre and post operative in Canal Wall up Mastoidectomy.
3- significant difference between hearing level pre and post operative in Canal Wall Down Mastoidectomy with tympanoplasty
4- significant difference between hearing level in Canal Wall up and Canal Wall Down Mastoidectomy with tympanoplasty.
So recurrence rate in Canal Wall up mastoidectomy is higher than in Canal Wall Down mastoidectomy . Also there is marked improvement in postoperative hearing level in Canal Wall Down mastoidectomy with tympanoplasty more than in Canal Wall up mastoidectomy.