الفهرس 
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Abstract
Summary
Untreated TM perforations may lead to hearing loss and middle ear infection even if they are of small size. Further, the patients have to observe water restrictions. The aim of myringoplasty is to close these perforations and thus improve hearing quality and reduce the susceptibility to middle ear infections.
Bilateral endoscopic transcanal myringoplasty is less in coast for the patients and they will be under anesthesia for once. However, conventional bilateral same-day myringoplasty has been rarely performed because of the theoretical risk of postoperative complications such as risk of iatrogenic sensorineural hearing loss, although no sensorineural hearing loss was reported after myringoplasty.
This study had been conducted at Otorhinolaryngology department, Beni-Suef University Hospital on 30 patients with bilateral CSOM prepared for bilateral endoscopic transcanal myringoplasty and were divided into 2 groups (perichondrium and cartilage groups) each group contained 30 ears.
In our study the success rate is 93.3%.
There was improvement of the air bone gap post- operatively in both groups. As shown, both groups witnessed significant improvement in the gaps post operatively; from 17.8±5.16 to 5.73±6.6 in Perichondrium group and from 17.6±4.93 to 5.5±5.68 in cartilage group
Residual TM perforations were reported in 2 ears among Perichondrium group and in 2 ears among cartilage group.
No complications as infection or SNHL were reported in both groups.