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成人镫骨显微结构与迷路囊相似,亦由骨外膜、内生软骨层及骨内膜组成。镫骨底板骨折可由手术损伤造成。如果修复不全可并发脑膜炎。由于近代耳外科的发展,镫骨骨折愈合过程成为一个有兴趣的课题。作者报告一例因中耳炎行乳突根治术引起两侧镫骨骨折的组织病理所见。46年前骨折的标本中可见到内生软骨层骨折为纤维组织充满;骨外膜骨折为骨痂所封闭。骨内膜无破裂,镫骨底板后缘轻度移位于前庭,环状韧带前部正常,内耳完好保存。作者认为完整的骨内膜及环状韧带可以防止感染及纤维组织侵入前庭。
Adult stapes microstructure and stray capsule similar, but also by the outer membrane, endogenous cartilage and endosteal composition. Sternal floor fracture can be caused by surgical injury. If incomplete repair may be complicated by meningitis. Due to the development of modern ear surgery, tarsal fracture healing process has become an interesting topic. The authors report a histopathological finding of tarsal fractures on both sides caused by radical mastectomy of otitis media. 46 years ago in the fracture specimens can be seen endogenous cartilage fracture fibrous tissue filled; fracture of the periosteum is closed by callus. No rupture of the endosteum, posterior margin of the stapes floor slightly shifted in the vestibule, anterior annular ligament normal, intact inner ear preservation. The author believes that a complete endosteal and ligamentous ring can prevent infection and the invasion of fibrous tissue into the vestibule.