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
位
额窦窦周围结构不同，对研究额窦生理、病理，以及提高鼻窦内
镜检查和额窦开放手术具有重要参考和指导意义。
（ostium
数）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，开于不同位额窦窦周围结构不同，对研究额窦生理、病理，以及提高鼻窦内镜检查和额窦开放手术具有重要参考和指导意义。
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