Methods The middle nasal meatus, semilunar hiatus, ostium of maxillary sinus and the neighboring structure in 40 samples of adult cadaveric cranial sagittal planes were anatomically observed.

• 方法在40例成人尸体颅矢状切面上,对中鼻道、半月裂孔、上颌窦口及其周围结构进行解剖学观测及上颌窦口的探针插入试验。