本文报告41例严重慢性中耳炎病人在进行乳突根治术时先把外耳道后壁削薄,然后沿外耳道后壁上下磨成小沟并去除此骨片。清除中耳腔病变和听小骨重建后再重建外耳道后壁。被去除的骨片可用来行外耳道后壁重建。也可采用同种异体软骨(鼻中隔软骨),这些软骨储存在骨库中。为了保证重建外耳道后壁的稳定性,需将骨 This article reports 41 cases of severe chronic otitis media in mastoidectomy when the posterior wall of the external auditory canal thinning, and then along the posterior wall of the external auditory canal grinding up and down into a small groove and remove the bone fragments. Removal of middle ear cavity lesions and reconstruction of the auditory canal after reconstruction of the posterior wall of the external auditory canal. The removed bone fragments can be used to reconstruct the posterior wall of the external auditory canal. Allogeneic cartilage (nasal septal cartilage) can also be used and these cartilages are stored in the bone bank. In order to ensure the stability of the reconstruction of the posterior wall of the external auditory canal, the bone needs to be repaired