At 1st or 2nd molar region the mandibular canal was basically parallel with the inferior margin 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。

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In approaching the clivus, the floor of the sella turcica may be removed and the bony opening extended downward on the clivus to the inferior margin 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。

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Results The changes of bone trabecula, inferior margin and canal of mandible were present in osteoporosis, but the height of alveolar bone remained the same as the contral.

结果骨质疏松症与牙槽骨骨小梁、下颌管管壁和下颌骨下缘骨皮质吸收之间明显相关，与牙槽骨高度无相关性。

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