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鼓膜前部及全鼓膜穿孔的修复一直是鼓室成形术中的难题之一,由于鼓膜前部较鼓膜后部血管少,因此血供也较少,所以,在植入的筋膜坏死和再吸收之前,鼓膜前部很难上皮化并愈合。其次这一部位植入的筋膜的固定也是问题,如果耳道鼓膜前角被破坏就可能发生瘢痕挛缩或前角变钝。夹层法鼓室成形术应用内外两层小片筋膜及用耳道上皮直接覆盖鼓膜纤维层,因而对克服上述困难是确实有效的且极少并发症.
Repair of the front of the tympanic membrane and perforation of the whole tympanic membrane has been one of the problems in tympanoplasty. Since the anterior tympanic membrane has less blood vessels behind the tympanic membrane, the blood supply is also less. Therefore, when the implanted fascia is necrotic and reabsorbed Previously, the anterior tympanic membrane was difficult to epithelize and heal. Second, the fixation of the fascia implanted in this area is also a problem. If the anterior tympanic membrane of the ear canal is destroyed, scar contracture or blunt anterior horn may occur. Membrane tympanoplasty Both inner and outer small pieces of fascia and the ear canal epithelium are used to directly cover the tympanic membrane layer, which is indeed effective and minimally complication to overcome the above difficulties.