The adjacent structures of the ostia differ from each other by the different location of the ostium.The clinical significance of the ostium and the nasofrontal duct were discussed.
认为，开
于不同部位的额窦窦周围结构不同，对研究额窦的生理、病理，以及提高鼻窦
窥镜检查和额窦开放手术具有重要的参考和指导意义。
；
；孔（等于osculum）The adjacent structures of the ostia differ from each other by the different location of the ostium.The clinical significance of the ostium and the nasofrontal duct were discussed.
认为，开于不同部位的额窦窦周围结构不同，对研究额窦的生理、病理，以及提高鼻窦窥镜检查和额窦开放手术具有重要的参考和指导意义。
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