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我科自１９９０～１９９７年施行开放式乳突根治术９８例，其中１期鼓室成形术２１例，均同时作耳甲腔成形术，随访结果示干耳率明显提高。１资料与方法１．１临床资料本组９８例，男５２例，女４６例；年龄１８～６１岁；手术证实胆脂瘤型２６例，骨疡型６２例；合并耳后骨膜
My department from 1990 to 1997 implemented open mastoidectomy in 98 cases, including 1 tympanoplasty in 21 cases, both at the same time for the first cavity of the cavity, follow-up results showed significantly increased dry ear rate. 1 Materials and Methods 1.1 Clinical data The group of 98 patients, 52 males and 46 females; aged 18 to 61 years old; confirmed cholesteatoma type 26 cases, 62 cases of bone ulcers; combined with posterior periosteum