At 1st or 2nd molar region the mandibular canal was basically parallel with the inferiormargin of the mandible.
而且，下颌神经管在下颌第一或第二磨牙区走行与下颌下缘基本成平行状。
2
In approaching the clivus, the floor of the sella turcica may be removed and the bony opening extended downward on the clivus to the inferiormargin of the sphenoid sinus.
为到达斜坡，有可能需要切除鞍底，然后将骨窗向下扩大到斜坡直至蝶窦下缘。
3
Results The changes of bone trabecula, inferiormargin and canal of mandible were present in osteoporosis, but the height of alveolar bone remained the same as the contral.