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一例自体砧骨移植后达21年,一例同种异体砧骨移植后达20年。因再手术,得以取出做组织学观察。肉眼观察,西块听小骨皆无腐蚀。组织学观察见,哈弗氏管内有活的纤维组织。自体砧骨内一些哈弗氏管内血管周围有单核炎细胞浸润。但这例患者于手术时发现有残余胆脂瘤。二块砧骨均无活动的破骨性骨吸收。在自体砧骨近骨内、外膜部,约有50～75％骨质被新骨所取代。但同种异体砧骨内,新生成的骨很少,大部是死骨和空虚的骨腔隙。偏振光检查,见胶原基质仍保持其正常的层状排列。上述结果证实了这样的看法。
A case of autologous incus after up to 21 years, an allograft incarceration for up to 20 years. Because of reoperation, can be removed for histological observation. Macroscopic observation, the Western Listening to the little bone are no corrosion. Histologically observed, there is live fiber in Haver's duct. Some of the Haevich's vessels within the autologous incus have infiltration of mononuclear cells. However, this patient found residual cholesteatoma at the time of surgery. Two incus bone no active osteoclastic bone resorption. In the autologous incus near the bone, the adventitia, about 50 to 75% of the bone replaced by new bone. However, allogenic incus, the new bones are few, most of the sequestrum and empty bone space. Polarized light examination, see collagen matrix still maintain its normal layered arrangement. The above results confirm this view.