and 10 ears were prosthesis,of 31 ears were reviewed and followed up over 0.5 year,of 26 ears (26/31,84%) improved over 10 dB or preserved in 40 dB as preoperation,5 ears of eustachian tube dysfunction gained no improved.

• 听力不良 31耳再手术后 2 6耳 (84%25 )听力提高 10dB以上 ；随访0 .；5年以上获得保持；另 5耳因咽鼓管功能不佳；鼓室黏连听力短暂提高后恢复至术前。