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罹患中耳炎者经手术除去中耳和外耳道骨壁病变后,再施行听力重建(鼓室成形)术会有困难。近年的封闭式手术虽保存了耳道后壁及上鼓室侧壁,但有残留病变、导致复发的危险。因而当前推崇在上鼓室鼓窦凿开或乳突根治术基础上,采用经福尔马林处理的同种骨组织修复耳道后骨壁及上鼓室侧壁,以利鼓室成形术的进行,但这种材料的保存液对组织移植床有毒性作用。为恢复骨性鼓环及外耳道,作者应用经敏感抗生素浸泡的同种脱钙骨片移植,其塑形容易、抗原活性低。共治26例10～54岁的慢性化脓性中耳炎患者,计中鼓室炎5例、上及中鼓室炎12例、乳
Patients with otitis media after surgery to remove the middle ear and external auditory canal wall lesions, and then perform hearing reconstruction (tympanoplasty) surgery will have difficulty. In recent years, although the closed surgery retained the posterior wall of the ear canal and the tympanic wall, but there are residual lesions, leading to the risk of recurrence. Therefore, currently respected in the upper tympanic sinus or open radical mastectomy based on the use of formalin-treated allogeneic bone tissue repair of the posterior wall of the posterior wall of the tympanic and tympanic cavity to facilitate tympanoplasty, However, preservation of this material on the tissue transplant bed toxic effects. In order to restore the bony drum ring and external auditory canal, the authors apply the same type of decalcified bone chip soaked by sensitive antibiotics, which is easy to shape and has low antigen activity. A total of 26 patients with chronic suppurative otitis media aged 10 to 54 years included 5 cases of tympanitis, 12 cases of upper and middle tympanitis,