ostia

1.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，开于不同部位的额围结构不同，对研究额的生理、病理，及提高鼻内镜检查和额开放手术具有重要的参考和指导意义。