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，开口于不同部位
窦窦口周围结构不同，对
窦生理、病理，以及提高鼻窦内
镜检查和窦开放手术具有重
考和指导意义。
复数）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，开口于不同部位窦窦口周围结构不同，对窦生理、病理，以及提高鼻窦内镜检查和窦开放手术具有重考和指导意义。
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