Aim:To seek the landmark of bony semicircular canal and inner lymph sac.
目的：寻找乙状窦前入路中骨性半规管的轮廓化方法和内淋巴囊的识别标志。
The bony semicircular canal was drilled until it was so thin that the membranous canal was visible as blue color, called blue line.
磨削骨半规管透过菲薄的骨质显示暗蓝色的膜半规管即为“蓝线”。
The bony semicircular canal was drilled until it was so thin that the membranous canal was visible as blue color, called blue line.
磨削骨半规管透过菲薄的骨质显示暗蓝色的膜半规管即为“蓝线”。
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